lmp vs conception date

HappyMommy28

Ok, so I know doctors typically have you put down your LMP but I know when our LO was concieved.  if I go by LMP I'm a couple weeks ahead of conception.  I don't want doctors telling me I'm 6 weeks pregnant when DH didn't get home from deployment until 4 weeks ago.  So - which is right?  LMP or conception?  I'm terrified of having the doctors make me induce because they think I'm earlier than I am.

BekW2009

They usually use you LMP unless you are very off when they do your dating u/s.

How many days after your AF did you conceive? I ovulated on CD20 but they still date me as if I ovulated on CD14 because the baby is dating right on track. 

skio

Tell them you know the conception date. Or just alter your LMP accordingly when they ask.

I also know conception date because I charted and know the day I ovulated. When I go to my first appt, I'm giving them an LMP date that is adjusted based on my O date. I want to give myself the latest possible EDD to avoid early induction. Mine is only a two day difference, though. I'd definitely be concerned about a difference of two weeks, but your doc should understand this. GL.

ETA: Yeah, ditto ramy. If you conceived four weeks ago, you'd be six weeks pregnant. Use this calculator and enter it both ways; it should be very close unless you ovulated really late in your cycle, which is also possible. https://www.babycenter.com/pregnancyduedatecalculator

courty625

I was confused about this too. One of the books I'm reading explained it very well, either What to Expect OT Week by Week.

prazenjc

ramy3695:

Edit: Ok I just reread your post. If you conceived exactly 4 weeks ago, then you will be 6 weeks pregnant. You're considered pregnant 2 weeks before conception.

This.

i got pg via IVF and we could even say we know the minute conception happened. It freaked me out to hear the 2 week before conception thing initially. But when I realized this, I no longer worried because everyone is. This also ties in with the 9 month myth vs. the 39 weeks people really are pg.

 I agree with pp that suggested getting a copy of "What to Expect When You Are Expecting." They put lots of fears to rest and clarify sooooooooo much.

 

kshiels320

It starts from the first day your body is ready to conceive, so 2 weeks before conception is when your body is preparing and when they start to count the weeks of your pregnancy! 

rowanthefrog

Conception date is correct, but they will probably go by your LMP at first.  Once you have had an u/s, they will revise using the date that the ultrasound says.

A 

firespirit717

They go by your LMP but after a dating u/s they will chnage the due date accordingly. Some women can convince their doctors that they know when the conceived and te doctor will ignore the LMP info from the beginning. Either way no big deal. I ovulated super late and am 4 weeks behind if dating was based off my LMP.

thetwistedwillow

1). No one can force an induction. If you are not comfortable inducing then decline. You have rights and should do research on birth options if you feel your medical professionals will pressure you to do things you are not comfortable with. This is the most important day of your life and birth professional and birth place should be given much thought and research.

2). Conception date is more accurate. Not everyone has a typical 28-day cycle. I have long cycles so I ovulate late, for example. My EDD is always 1-2 weeks later than estimated from my LMP because I conceive later. If you have 38-day cycles then your EDD won't be accurate based on LMP at all.

MrsMoody2006

Tell them your lmp was 2 weeks later than it really was.