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Is there any way to tell when my baby was conceived?

by Anne Sommers, Licensed Midwife | 161 Comments

Q I was wondering how do I know when I may have conceived and can the doctor do an ultrasound to see how old the baby is and it show up when I conceived?

A You will know when you conceive, when you miss your period. Then you can get a pregnancy test ( a home pregnancy test or have a blood or urine sample analyzed) to verify that you are pregnant. Neither lab work nor an ultrasound will confirm pregnancy the day you conceive. The fertilized egg must travel through the tubes and then attach to the uterus. An ultrasound later in pregnancy (about 6 weeks from your last menstrual period) will show a gestational sac and a heartbeat. The ultrasound tech can tell how old the baby is. The earlier the ultrasound is performed the more accurate the due date is.


Click here to Ask Anne your pregnancy questions

Anne Sommers, LM is a Licensed Midwife in Southern California and founder of Agape Perinatal Consultation & Birthing Services. Anne has attended and personally delivered hundreds of beautiful bouncing babies in some very wonderful and natural settings -- like in the water! She has appeared on various Southern California radio and cable television shows, talked to birth organizations, was editor for several child birth publications and was the owner, editor and publisher of "Mom" Magazine, a quarterly publication in circulation for over seven years. She completed Seattle Midwifery School's Challenge Process and the NARM exam (supervised by the California Medical Board) qualifying her for midwifery licensure. Anne actually made history as noted in the Orange County Register for being one of Southern California's first Licensed Midwives. She is also the mother of two children, born at home, with the attendance of midwives. The Baby Corner The Baby Corner - The Magazine for Expecting & New Parents

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Showing 1 - 10 out of 144 Comments
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Guest Jan 20, 2017 01:23:26 PM ET

My last period was july 4. i had sex like the 10-15th, then again on the 17-20th. my due date is april 9th. when did i get pregnant?

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Pprettydamsel Sep 29, 2016 06:46:30 AM ET

My lmp was on the 13th of june 2016, i had sex with my real boyfriend on the 22nd-28th of june. i was raped on the 8th of july and when i conducted a pregnancy test on the 9th of august, i was 2 months pregnant. was i pregnant before or after my lmp, and who is going to be the father of the baby?

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jessie Apr 7, 2015 09:55:15 AM ET

I've been messing around with this guy for over a year now. we went out of town while i was still on my period, but before we left it was over. we slept together, which was on the 13th of september. i slept with someone else on the 26th of sept. the doctor told me my conception date was the 26th. could i possibly be pregnant by the other guy? i need answers fast. my due date is june 19th, and i have to know who the father of my child is before he is born. can anyone help me out?

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Guest Mar 31, 2015 06:16:02 AM ET

Please. i really need help. i have a long term boyfriend but we broke up in january. i had what i thought was protected sex with an ex on 14 february 2015. (i say thought as he is now implying that he put holes in the condom). i got back with my long term boyfriend about 5/6 march 2015 and i had unprotected sex with him. i had what i believe is a normal period on 27 feb 2015. i am now pregnant. is it likely to be my ex or my current boyfriend's child?

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Guest Mar 13, 2015 01:01:36 AM ET

I had sex with an ex on the tenth but he didn't. but, the doctor say my conception is the 14th, and that's the day me and my bf did it. so could he be the dad?

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guest Mar 3, 2015 10:47:28 AM ET

Me and my girlfriend broke up on july 24, and she is pregnant. her first week is july 28, and is due on april 20th. she got back with her ex, and is trying to say it's his. how can i tell when the baby was conceived? i know when we broke up, she never had her period. please help!!!!

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Guest Jan 24, 2015 12:56:22 AM ET

I'm 14 weeks pregnant. in which month did i get pregnant?

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unknown Jan 18, 2015 10:44:52 PM ET

My last period was on december 23, 2014. i stepped out a few times from my relationship, and i just found out i'm pregnant, but i'm not sure who the father is. guy #1 on dec 16th, or guy #2 on new years, guy #3 on jan 4th, and guy #4 on jan 7th. please help. i was told i'm less then a month. please help.

Unknown2 Feb 20, 2015 12:29:46 PM ET

Omg, we have the same exact story, except i only had two different guys, but on the same days (dec 16th, and new years). i'm "supposedly" 11 weeks pregnant, so i counted back both dates. for the 16th, i'd be 9-10 weeks, and from new years i'd be 7-8 weeks going on 9. but, in my ultrasound my baby looks like a baby, so i don't know sweety. i'm going to the doctor today to figure this out, because now i'm unsure of who the dad is, and how far along i really am.

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guest Jan 15, 2015 05:05:26 AM ET

If my ultrasound says that i'm due on march 30th, and i had sex on june 17th, and july 5th and 6th it's not possible it was from june right?

bebe Jan 28, 2015 06:17:16 AM ET

Yes it is possible. doctors usually date pregnancies out 40 weeks. that's about 10 months.

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Guest amie Sep 20, 2014 08:14:38 PM ET

Hi. my lmp was the 22nd of july, and my due date was 10th of may 2014. but, i delivered the baby on the 28th of april this 2014. i have slept with mr. wrong on the 5th of july twice, and again on the 15th of july, twice on the 16th 17th, and 18th. i sleep with my current one. i'm confused. who is the father?

Guest Oct 6, 2014 07:43:12 PM ET

If i were you get a dna test from the guys you slept with, because whoever the the father is needs to know that you had a baby. make sure you get child support no matter what. it's just to be on the safe side.

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