1st Ultrasound Confused

2 Replies
christan10 - May 11

I had my first unltrasound today and based of my lmp i should be 7w1d but when they did the ultrasound it shows im 5w4d...they heard a heartbeat which was 107mpb which they said is normal for 5w, but how can i be only 5 weeks if my lmp was 03/21? im just so confused can anyone enlighten me?

 

olivia - May 11

ugg, isn't it frusterating? I just had my first ultrasound and I am only 8 weeks and I thought I was 10. Two more weeks to add on to my first trimester that I thought were done!!! Well, how it happened for me was because my periods were still irregular from having my first baby. So that throws off ovulation, so I could no longer go from the first day of my last period. Do you have regular periods every 28-30 days? It happened to me and probably to you, that you did not ovulate in the typical 14 days from your last period window. You ovulated later. Does this make sense? Anyway, congratulations on your pregnancy and heartbeat!

 

smskam - May 11

u know, may be they were talking of the baby's age...it is always calculated 2 weeks less ... pregnancy is calculated from the first day of ur LMP.in a 28 days cycle.. doc's say u r most likely to concieve on day 14(though not all do).... u r considered two weeks pregnant even before u actually b/d and or concieve..hence the difference..for example: if u r 4 weeks preg the baby is only 2 weeks old.if u r 6 weeks the baby is 4 weeks old. i hope i could help..

 

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