2007-02-09 00:09:35 · 21 answers · asked by wendy b 1 in Pregnancy & Parenting ➔ Pregnancy
They go from the first day of your last period. At conception you are actually considered two weeks pregnant. Odd, I know!
2007-02-09 00:18:44 · answer #1 · answered by ? 3 · 1⤊ 1⤋
Hello there. Since typically it is impossible to know when any one woman ovulates or conceives doctors and the medical field in general took to using the first day of the last period (lmp) as the first day of pregnancy. Of course you know, (we all know) that you did not get pregnant that day. There will always be a two week difference between what all the guides and fetal development charts say and the actual "conception date". This is just a given......so when the charts or whatever are talking about where you are at, developmentally, when you are 12 weeks pregnant it is just a given that you are actually only 10 weeks pregnant. Now isn't that just clear as mud? lol....it is just the way they do it.
It is true that if you have an ultrasound ( and they are by no means routine) they will be able to determine fetal age by taking measurements of certain important parts of the baby's anatomy. They use the size of his thigh bone and his head....that sort of thing. It is true that these estimates are very accurate but there again, there will still be that two week difference when you are reading in a book or something about your babies fetal development.
Congratulations on your pregnancy! You have so much to look forward to and so many wonderful things ahead of you!
Love and Blessings
Lady Trinity~
2007-02-09 00:24:13 · answer #2 · answered by Lady Trinity 5 · 1⤊ 0⤋
There are a couple of ways to calculate your due date. I think the most common is to go from the 1st day of your last period and count 40 weeks. As you get further along your doctor will have a better estimate of exactly how many weeks you are based on the size of the baby. Most babies grow at about the same rate for the first several months. Hope this helps! Congratulations!!
2007-02-09 00:24:26 · answer #3 · answered by berracahband 1 · 0⤊ 0⤋
Is your cycle regular? If it is, start with the first day of your last cylce, count back 3 months the add 7 days. So it looks like 8/31 would be your due date, but you should really see your doctor and have an ultra sound to be sure.
2007-02-09 00:24:01 · answer #4 · answered by stumped 1 · 2⤊ 0⤋
http://www.bbc.co.uk/parenting/pregnancy_calendar/index.shtml
It goes from the date of your last missed period, as the exact date of conception can be difficult to pinpoint. The site above will give you a rough due date, and a bit about where you're up to in your pregnancy at the moment if you type in the date of your lmp. Your midwife will also calculate a rough due date from the date of your lmp, and a dating scan should give a more accurate due date.
2007-02-09 00:32:31 · answer #5 · answered by fluffynickers 2 · 0⤊ 0⤋
The midwife normally takes it from the first day of your last period then adds seven days and nine months. This gives them a rough estimate when your baby is due. But they can tell you more after your first scan. Good luck x
2007-02-09 00:13:04 · answer #6 · answered by spensmum 4 · 0⤊ 0⤋
If you know the date of conception, then your due date is 38 weeks from that date. If you are unsure, then it's 40 weeks from the date of your last period.
2007-02-09 00:17:16 · answer #7 · answered by Amanda M 4 · 1⤊ 0⤋
Im pregnant too, and when i went to the doctors they asked me when was the last day i started my period. Which was dec 5. I went on jan 30 and i was 7.6 weeks pregnant. Also search on the internet for due dates which will also tell you how many weeks you are.
2007-02-09 00:30:10 · answer #8 · answered by nenasweetie19 1 · 0⤊ 0⤋
You take it from the first day of your last period
2007-02-09 00:28:30 · answer #9 · answered by Kerri 3 · 0⤊ 0⤋
You start counting at conception; the doctor will be able to give you a better idea by doing a physical exam.
2007-02-09 00:17:24 · answer #10 · answered by Enchanted 3 · 1⤊ 0⤋