Kind of confused, if someone could explain something to me...

colegirl00 · July 2013

So, my last pd was May 10th. So,my lmp was June 10th. On the 20th i found out i was pregnant. According, to how you calculate how far along you are and your due date. I should roughly be 7 weeks pregnant right now. Well, i had a vaginal U/S done two days ago do to sharp stabbing pains that i was having. Come to find out according to the ultrasounds, I am only measuring at about 4.55 weeks and possible twins!! I dont understand how i am only 4.5 weeks pregnant, but if calculated from Last pd I should be about 7 weeks?

MrsHamon09 · July 2013

Maybe you ovulated late. Its the only suggestion I have sorry

golfingdarwinfish · July 2013

I'm confused. Your LMP is May 10th; LMP is the first day of your last menstrual period prior to conceiving. If you didn't bleed June 10th it is not your LMP. Plus, you couldn't have a period on June 10th and then find out you are pregnant on June 20th. It's possible you were having a very long cycle and actually ovulated quite late leaving you 4.5 weeks pregnant. When is your next ultrasound?

Was the ultrasound done at an ob's office/facility or was it done in the ER? If it was done at the ER you need to make an appointment with an ob and explain your history when you call to make the appointment.

azzyberry · July 2013

colegirl00:
So, my last pd was May 10th. So,my lmp was June 10th. On the 20th i found out i was pregnant. According, to how you calculate how far along you are and your due date. I should roughly be 7 weeks pregnant right now. Well, i had a vaginal U/S done two days ago do to sharp stabbing pains that i was having. Come to find out according to the ultrasounds, I am only measuring at about 4.55 weeks and possible twins!! I dont understand how i am only 4.5 weeks pregnant, but if calculated from Last pd I should be about 7 weeks?

I'm assuming you meant your lmp was May 10?

Even though using the LMP is standard for calculating the due date, it's not terribly accurate unless you have a 28 day cycle with ovulation occurring on day 14. Ultrasounds are more accurate at dating pregnancies. You probably just ovulated much later.

colegirl00 · July 2013

The ER and I called the OB office and they said just to keep my appt from before. So, I'll go back at 67 weeks.

No. I had a Pd on May 10th. So, I believe I was supposed to start on June 7th or 8th.

I guess I just didn't realize it was possible to ovulate late. Not real familiar with this stuff. I just go with it.

colegirl00 · July 2013

I thought LMp= last missed period. Sorry. So my last period was May 10th.

azzyberry · July 2013

colegirl00:
I thought LMp= last missed period. Sorry. So my last period was May 10th.

LMP = Last Menstrual Period

Tallulahsmom · July 2013

Hey crazy things happen all the time. My DH and I decided to chart after our first pregnancy. Birth control is very hard on my body. We knew the risk we were taking and were willing to accept it since we want a big family anyway. It worked great for 17 months. We got pregnant on day 8 of my cycle. I had my regular 5 day period. And apparently ovulated on day 8! (My husband tells every one it was planned because we knew the risk!;)) +9

6

S&DHutson · July 2013

Tallulahsmom:
Hey crazy things happen all the time. My DH and I decided to chart after our first pregnancy. Birth control is very hard on my body. We knew the risk we were taking and were willing to accept it since we want a big family anyway. It worked great for 17 months. We got pregnant on day 8 of my cycle. I had my regular 5 day period. And apparently ovulated on day 8! (My husband tells every one it was planned because we knew the risk!;)) +9
6

So similar to me this time. My LMP was March 30, ended April 4th and I got pregnant on the 9th! I was surprised but my DH was expecting it. You just never can tell ; ) But from what I understand you can get pregnant 2 days or so before or after you ovulate so that puts me a little closer to normal if you think about it that way.

Tallulahsmom · July 2013

I picture my husbands sperm dressed as little ninjas hiding behind my ovary waiting for the egg! I seriously have this comic strip in my head. If only I were a good artist. It is hilarious and all wasted on me! Ha Ha!

littlemissblondiex · July 2013

Ultrasound dating is not based upon your LMP. It is based upon gestational age. Ovulation usually occurs 14 days after your period but is just an average. There is no way you can get pregnant the day after your period. Your date and the date from the Ultrasound are a little over 2 weeks off which would make since because ovulation does not occur until 14 days after, so you probably ovulated a little later. I would always go with the ultrasound dates because they are more accurate.

colegirl00 · July 2013

I think there's always room for learning. So, ya your right I do have a lot to learn. But, don't we all.

mkhunts · July 2013

A friend of mine just delivered twin girls about a month ago and when she found out she was pregnant she thought she was farther along, then when they found out it was twins they moved her weeks down... I guess she said it is standard with twins?

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