Can implantation occur the day before AF is due?

[BandhaAid]

Sorry if this is a stupid question but I don't totally understand the mechanics of the implantation bit.

I have a short luteal phase of 10 days. If I conceived and implantation happened on 9 dpo (as I know that is the average day for implantation), would the hormones kick in immediately and stop AT arriving the next day?

Thank you

I would say that having such s short luteal phase could be a problem. In your shoes, I’d get that investigated as it could be a struggle.

What are you really asking OP? Is it whether you are likely to conceive with a 10 day luteal phase? Or are you wondering if implantation needs to occur early enough before period is due to avoid going into period mode?

Are you thinking that if you conceive you then need implantation to be on the early side in order to become pregnant?

I'm only clarifying because it's kind of irrelevant, there's nothing in the world you can do to influence implantation so what you need to be doing is looking at your luteal phase and crossing your fingers for an early implant.

@KarateKitten Yes, I was mainly wondering if implantation needs to be early enough to avoid going into period mode! I am aware that if I conceived then implantation would have to be on the early side in order for me to get pregnant but that obviously that is not within my control.

@JoJoSM2 I know it's quite short but all the research I've done suggests that anything under 10 days is abnormal. Still, I guess I will need to go to the GP once I've got a few BBT charts to show him, because I'm aware it won't make conception easy :-(

A luteal phase of 10 days is considered to be normal, albeit at the shorter end of normal, so that’s not a concern in and of itself.

I’m not sure I follow your specific query though, sorry.

Your biggest concern is that you have a shortish (but not quite abnormally short) luteal phase because of low progesterone. That is what your bigger problem might be rather than implantation timing. It would leave you with an unfavourable lining for any egg that does manage to get fertilised.

Thanks @Pibbee (that was the name of my childhood cat ☺)

I was wondering if implantation happening on day 9 is still too late for someone to become pregnant if their period is due the next day.

Okay, so I guess I need to see a doctor about my luteal phase?

@BhandhaAid no way! Re the Cat name, that is! Brilliant!

Re luteal phase, I don’t necessarily think you need to see a Doc at all. In fact, if you were to do so, they would probably just say it’s within normal range and of no concern. I don’t think you can assume it’s due to low progesterone either. Some people just have shorter cycles than others.

Thanks, @Pibbee, that does make me feel a bit better!

Oh, and having just checked my chart, my period last month started the day after 10 dpo (so it starts on 11 dpo, basically). I don't know if that means it's a LP of 10 or 11 days 😂 But either way, it's quite short.

I think OP that you need to be trying for a while and if nothing is happening, you go and see about getting checked out. One of the main things they will check is your progesterone. But as it stands, there's literally nothing that says you won't get pregnant based on your info. So try to give it a chance. How long have you been trying?

I have a 9 day luteal phase. My AF was due today at 10DPO (hasn’t turned up but I’m spotting so another month of failure) and so in order for me to conceive I’ve looked at ways to lengthen luteal phase. You’ll be lucky if a doctor even believes you. Mine didn’t. Despite TTC for 14 months now.

I’m currently trying acupuncture to lengthen mine. Seems to have worked this cycle by a day after only one session unless I’ve had a random longer cycle or ovulated later.

Have a read of this link and see if you can add the vitamins and foods into your diet.

natural-fertility-info.com/luteal-phase-defect.html

If I’m honest it’s exhausting and frustrating and when I didn’t spot yesterday I got my hopes up so much. TTC is cruel. 😢

@KarateKitten Only a couple of months so I'm not panicking (yet!) But have only just really realised that my LP seems short.

@MouseLove Thank you for the info, that's rubbish for you though. I'm sorry you have had problems with your doctor.

Mouse, they should investigate anyway if you’ve been unsuccessful with ttc for over a year. If this GP is unhelpful, change GPs.

OP, implantation is a process that takes several days. It doesn’t just happen in a minute. Add to that the fact that the egg might not even fertilise for 12h after ovulation, and the fact that embryos might take up to 7 days to even hatch out, a 10-day luteal phase sounds tricky. It probably requires a bit of luck and a very fast-paced embryo to make it before getting flushed out.

Thank you, I'll just have to cross my fingers then.

When I conceived my son four years ago, I had a luteal phase of 7 days for two months (had just come off the pill) and in month three, we conceived! Have no idea how that happened but presumably my LP jumped from 7 days to at least 10 in one month. Our bodies are weird 😂

Some embryos can be very fast (boys more often) and be all hatched out in 5 days...

That would probably explain why I have a son, then!

But then after they hatch, they have to implant?

Yes, they need to hatch out from the zona pellucida and then gradually attach themselves to the lining (adplantation and implantation or whatever the stages are). Once it’s done that, it starts secreting hCG alerting the corpus luteum to carry on with sectreting progesterone so you don’t get your period.

I know from IVF studies, that out of those fast embryos that start hatching on day 5 already, 70-72% are boys. It’d be interesting to see if ladies with short luteal phases have more boys than girls ;)