Have you ever been up at 2 am googling “am I pregnant?” because you’re sure that that random cramp, sore boobs, and weird food craving means something?
Well then, this one’s for you!
There are no reliable positive signs after embryo transfer. You can get tender breasts, bloating, cramping, fatigue, or even spotting, whether you’re pregnant or not. It’s largely the progesterone you’re taking.
And if you have no symptoms? That doesn’t mean your transfer failed either.
You’ll have to wait to get your beta hCG blood test. This is usually done around 9 days after your day 5 embryo transfer.
I’m Dr. Lucky Sekhon. Double board-certified reproductive endocrinologist and infertility specialist in New York City. And I’ve done IVF myself! Through Instagram, my book The Lucky Egg and my newsletter The Lucky Egg Drop, I’m here to share science. And put much-needed perspective into a world of fertility misinformation.
Let’s talk about what really happens after an embryo transfer. One day at a time. And why those symptoms aren’t the hints that you think they are.
There are no reliable positive signs after embryo transfer
NONE. ZERO. ZIP. ZILCH. How can I make this even stronger?
There is NOTHING definitive that you can tell if you are pregnant during the 2 week wait. No sore boobs. No cramps. No extreme fatigue. No strange pulling feeling in there that you are sure is your embryo settling in. It’s an absolute mind trip that you can go on when doing IVF because many of those classical pregnancy symptoms are related to the progesterone that you are already taking in your IVF treatment.
I see people fall into this so often. Sore boobs one day. They are cautiously optimistic. Sore boobs go away the next day. Defeated! I’m out. Getting a cramp. Oh no, google away! The thing is that the early symptoms of pregnancy are very, very, very similar to the symptoms of an unsuccessful cycle.
For successful cycles that result in perfectly healthy babies, I don’t expect people to have specific symptoms during the 2 week wait. That’s my clinical opinion, from how progesterone works and what I see each day. I’m sorry that it’s not clear cut but maybe understanding some of the biology behind it will help you stop trying to make everything a pregnancy test.
What happens after embryo transfer, day by day
So first, to clarify, the infamous “2 week wait” after IVF really isn’t 2 weeks. More like 8-12 days after transfer of your embryo, because remember, it’s already a few days old! So a day 5 blastocyst has already been growing in the lab for 5 days. So it doesn’t start from scratch when it gets transferred into your uterus.
I’ve written up everything from start to where we are now in the frozen embryo transfer timeline and the step by step IVF timeline. Then after the transfer is done, here’s basically what’s going on behind the scenes.
Embryo transfer day by day (after a day-5 transfer)
| Day after transfer | What the embryo is doing (approximate) | What you might feel, and why | What it tells you |
|---|---|---|---|
| Day 0 | The embryo is placed in the uterus. | Mild cramping or bloating from the procedure or a full bladder. | Nothing about success. |
| Days 1–2 | The blastocyst keeps expanding and may begin hatching from its outer shell. | Bloating, sore breasts or fatigue from progesterone. | Nothing. |
| Days 1–7 (most often 3–5) | The embryo may attach to and begin implanting into the uterine lining. | Possible mild cramps or spotting, which also happen in cycles that don’t work. | Nothing reliable. |
| After implantation, up to day 8 | hCG production begins and levels start to rise. | The same progesterone symptoms, or absolutely nothing. | Symptoms tell you nothing; an early negative home test may be misleading. |
| Day 9 (8–10, depending on your clinic) | Your clinic measures hCG in your blood. | You may feel pregnant, premenstrual or completely normal. | The first objective evidence of pregnancy. |
This is a rough guide, not a strict schedule followed by all embryos. The timing of implantation is an extrapolation based on studies of natural conception. It’s not a daily measurement in transfer patients. For a day 3 transfer, just add 2 days to each step on this. Check with your clinic for their testing schedule.
See that last column? most of them say “nothing.” Your embryo can be doing all kinds of things while you feel perfectly normal. Or feel every cliched pregnancy symptom while your body is just reacting to progesterone. If you want to see how the timing of implantation relates to ovulation for non-IVF, try my implantation/DPO calculator.
Implantation usually happens 1–7 days after embryo transfer
A landmark 1999 study in the New England Journal of Medicine followed women who got pregnant naturally and detected when hCG first appeared in urine. In pregnancies that lasted at least 6 weeks, implantation was detected 6 – 12 days post ovulation. 84% of pregnancies had implantation on day 8, 9 or 10.
So for a day 5 embryo transfer – this may mean that implantation will occur maybe 1-7 days after transfer. Often 3 – 5 days after transfer. This is a guess based on natural cycle results. Not a measured IVF specific timeline. So don’t get stuck in whether it should be Tuesday or Wednesday that your embryo is implanting.
After implantation, the embryo releases an important signal – hCG. In a natural cycle, this signal to the ovary is to continue progesterone production to support the lining until the placenta can take over. With medicated frozen transfer – we are giving the progesterone. The problem is, you can’t “feel” the hCG rising. Or that an embryo has implanted. Fascinating biology. No “notifications” for that I’m sorry to say.
Cramping, sore breasts and bloating after transfer come from progesterone
Progesterone is one hell of a hormone. And in IVF, it’s also one hell of a drug.
Let’s get this out of the way first: the 5 most common complaints during the two week wait are tender breasts, fatigue, spotting, cramping and bloated feeling. You also have these symptoms right before your period and early pregnancy. This is all because of progesterone.
Progesterone levels increase after ovulation in a normal cycle. If there’s no pregnancy, levels decrease, then lining sheds and you get your period. During IVF, you’re using progesterone regardless of implantation. So you could have any symptom and it’s even more difficult to decipher.
I’m not the only one who thinks so. The FDA prescribing information for ENDOMETRIN (a vaginal progesterone used in fertility treatment) backs this up. In one assisted reproduction study approximately 12% of patients had abdominal pain. Other side effects: abdominal distention, fatigue, vaginal bleeding. Also breast tenderness, bloating, mood swings and drowsiness reported with other progesterone products.
So a lot of the “10 signs your embryo transfer worked” you see online are side effects of the drugs listed. The symptoms are there…but not signs of pregnancy.
Cramping after embryo transfer can’t tell you if it worked
It could be from the transfer procedure or the medications. Sure, cramps can occur in early pregnancy as an embryo is implanting, but it can also be a prelude to breaking down the lining for your period. So, regardless of whether you have a cramp 3, 5 or 7 days after transfer, there is no way for me to know if you’ve had an implantation from the timing of the cramps. So I always caution patients to not over analyze everything.
But mild cramping and other things to be concerned about are different. If you are having severe or increasing pain, or significant belly swelling or heavy bleeding or a fever, then you need to call the clinic immediately and not try to interpret it as a sign of pregnancy.
For practical help with progesterone, check out my insider tips on how to survive progesterone shots. And for those anxious about your measured level, here’s what it means when your progesterone is low in early pregnancy.
Spotting after embryo transfer isn’t a reliable sign of implantation
Some women will experience very slight spotting during the potential implantation period. This is often referred to as “implantation bleeding” and is typically pink, brown/rust colored spotting that happens for a few hours/days but stops and doesn’t get progressively worse like your period would.
I know the difference as I had the “spotting on and off” early in my first pregnancy thinking it was my period. No spotting at all during my frozen embryo transfer pregnancy. It can vary pregnancy to pregnancy.
However, the difference between bleeding at the time of implantation and bleeding as a result of implantation is important. In a prospective study from 2003 of naturally occurring pregnancies, they found that 14 of 151 women (9%) experienced some bleeding during the first 8 weeks of the pregnancy. 12 of the 14 pregnancies resulted in live births. The bleeding was most common at the time of the “period”, and infrequently occurred at the time of the estimated implantation. They couldn’t find any evidence that bleeding was caused by implantation. And in IVF there are also other potential causes: fluctuations in progesterone, vaginal irritants (vaginal medications, cervix, polyps in the uterus) etc.
Spotting isn’t necessarily an indication of implantation. Not spotting isn’t necessarily an indication of failed implantation. Light spotting doesn’t necessarily mean you should be concerned but do inform your clinic of any bleeding after a transfer. Especially if the bleeding is heavy/constant/painful. And don’t stop taking your meds “because you think you are starting your period”.
Having no symptoms after embryo transfer is normal
I hear this all the time (even after positive pregnancy tests) “Dr. Lucky, I don’t feel pregnant at all. I felt nauseous yesterday. Today I feel perfectly fine.” Here is the response: Fluctuation of symptoms (or lack of symptoms) is totally normal. Some women will have all the symptoms. Some women will feel like they are going about their usual routine. Some women will feel very different in each pregnancy.
Pregnancy nausea usually starts weeks after your beta
Not necessarily. “Pregnancy nausea” does not typically set in until well after the two week wait. In fact, a prospective study of 363 live birth pregnancies showed that the mean time to onset of nausea/vomiting was 39 days (i.e. 5.5 weeks pregnant) from the last period and about 20% never had nausea or vomiting. You are only 4 weeks (approx) pregnant at 9 days post day 5 transfer. I typically tell my patients that by the time “pregnancy nausea” (i.e. the type of nausea that you can identify as pregnancy related) is becoming apparent it is usually between 6-8 weeks.
So if you are 7 days post transfer and wondering “why am I not nauseous?” then don’t assume your cycle is a bust. Also, there is no scientific basis to “you should be feeling pregnant yet”. Also, worrying about every little fluctuation in symptoms will not change how I manage your care. That’s what bloods and ultrasound tests are for. Not whether or not you have more breast pain today than yesterday.
How long after embryo transfer to wait before testing
We usually test your first beta hCG at around 9 days after your day 5 transfer (some clinics will test as early as day 8-10). Sometimes you MAY be able to detect hCG as early as 8 days after transfer using a sensitive home test. But there’s a difference between potentially detecting a pregnancy vs being able to rule it out. Early negatives could mean you just haven’t had enough hCG in your urine yet. If your trigger shot had hCG in it, if you test too early you might get a false positive due to the leftover med.
Which is why I try to tell my patients to wait until their scheduled blood test, even though I know plenty of folks will still test at home. It’s not the curiosity thing that bothers me, it’s the possible decision making around treatment based on potential false results.
A low first beta hCG isn’t the same as no chance
Having a low first beta doesn’t mean zero chance. I was a co-author on a study (in Fertility and Sterility) from 2026 on 6,410 transfers of single euploid embryos where there was a positive hCG at 9 days post-transfer. 71.0% resulted in a live birth overall. If your first hCG was 100 or more mIU/mL, the rate of live birth was 87.8%. And even among the lowest hCG group (2.5 to less than 11 mIU/mL), there was a rate of 1.6% resulting in a live birth.
It’s worth noting these numbers were on genetically tested embryo transfers for these patients, so not all cycles are reflected. But the idea is you’re more confident with higher first betas and that extremely low numbers give much less chance – but not necessarily 0% chance. Your clinic will take this result in context and generally repeat the test to see how it’s changing. There’s an in-depth discussion in my guide to understanding beta hCG levels after IVF, and you can see how it’s changing between two tests in my beta hCG calculator.
I really want to stress this rule: Never discontinue progesterone, estrogen, or any other medications just from a home pregnancy test or how you feel. Only change medications when your fertility team advises you to do so. Even if you see a faint line, negative home pregnancy test, or even low first beta – don’t try to take matters into your own hands.
Getting through the two-week wait
Ah if only I had a magic wand for this. I did IVF myself and I know no matter how much you know about what’s going on the waiting can be killer. You can know the symptoms are not predictors of pregnancy but you’ll still find yourself analyzing all the cramps. This is what I tell my patients:
- Try to get distracted. Find non-baby related things to look forward to. Go see your friends. Watch that show you’ve been waiting for. Do something at work.
- Don’t google (much). If you have to then have your “google time” for the day and then shut down the tabs
- Find someone who understands. Whether it’s a friend who went through this, a therapist or an infertility community.
- Follow your usual habits within your clinic’s instructions. You don’t have to just lie there. Here’s what to know about exercise during and after a transfer.
And above all don’t make this a “passing the test” time. The embryo implanting or not is not about your level of stress. Your positivity or lack thereof. If you ate a certain magic food or not. There are sensible things you can follow. I’ve talked about things that actually increase your embryo transfer success (and what doesn’t). It is not about your obsession with checking your body for signs.
I think the most productive thing to do is just accept the mystery and say it is what it is. Trust me. I have been there, done that. And I know it’s easier said than done. Try to be nice to yourself. This is hard even if you know better.
You don’t need to feel pregnant to be pregnant
If you’re looking for that one symptom that means your transfer worked… sorry, that’s not the news you wanted to hear. But I hope this is news that will comfort you. You don’t need implantation bleeding or sore boobs or cramping or nausea to be pregnant. And you don’t really know anything if you experience these things. Your body isn’t withholding things from you. These things just aren’t accurate. The first real sign is your beta. But in the meantime, you should be resting, being supported and just given the grace to not have all the answers yet.
If your beta comes back negative, just take the time to absorb that before going back and questioning everything. And when you’re ready, you can use my guide on what questions to ask your doctor after you’ve had a failed frozen embryo transfer so you can have a productive discussion on the next steps.
I’m Dr. Lucky Sekhon. I’m a practicing REI in New York. Follow me on Instagram for more science-based fertility education from someone who’s been on both sides of the exam room. Subscribe to my free monthly newsletter (The Lucky Egg Drop) and grab a copy of my book (The Lucky Egg: Understanding Your Fertility and How to Get Pregnant Now).
