Expert: Dorothy H, LCCE - 8/24/2010

Question
hi i have question my last lmp was on april 8 2010 my period last five day on the april 11 i had sex with a parnter 1 while my period was still on and it went off on the 13. then on april 18 ,22,and 24 i had sex with parnter 2. i went to the doctor on may 18, they said i was 5 weeks and 5 day they did a u/s  and on the june 2 they said i was 7 weeks and 6 day they did another u/s and on june 15 they did another u/s and they said i was 9weeks and 5 days  they said the  u/s match up with my last lmp. the doctor said i got pregnant around april 22 i just want to see if u agree and will that make parnter 2 the father and not parnter 1 . and is there anyway parnter 1 can be the father.
and do you usually ovulate around the same time every month are can you ovulate one month on yor period then the next month on 14 day are it around the same time every month i have a regular 28-30 cycle every month. thank you

Answer
Both ultrasounds point to conception occurring around April 22, as your doctor said.  1st trimester ultrasound can be off by a couple of days, but it's not going to be off by 11 days. Everything points to Partner #2 being the father.

Most women ovulate 14 days before they get their period.  If your periods are normally 28-30 days apart, then you generally ovulate on Day 14-16 of your cycle.

If you have a very short cycle, less than 20 days, it is possible to ovulate during your period.

If your periods are regular, then you probably ovulate at around the same time every month. You don't want to count on that as birth control though, as anyone can have an "off" month where they ovulate earlier or later than usual.

In your case though, it's pretty clear that you conceived around April 22.


Dorothy H, LCCE