how do the The doctors estimate the due date of a baby
2007-02-03 16:02:14 · 12 answers · asked by danmak2001 1 in Pregnancy & Parenting ➔ Pregnancy
They generally use a little wheel that calculates 40 weeks from your last menstrual period (LMP). Which would be fine if every woman had the same exact cycles. But we don't. If you know your cycles, tell your doctor which cycle day (CD) you ovulate on. Or if you happen to know the date of conception, even better.
2007-02-03 16:07:59 · answer #1 · answered by Mama to 4 wanting more 2 · 2⤊ 0⤋
Doctors estimate the due date of a baby by asking the woman the date of the first day of her last menstrual period and then calculating approximately 40 weeks or 280 days since that time. This works for a woman with a regular cycle of 28 days. If a woman's cycle is not regular, a doctor may order an ultrasound to determine the estimated date of delivery (EDD). The doctor will give you an approximate day with either of these estimations plus or minus 10 days as most babies do not arrive on their due date.
2007-02-03 16:10:58 · answer #2 · answered by BlueCat 3 · 1⤊ 0⤋
By the first day of your last period. Then after the physical exam they can estimate due date by checking the uterus size. Also an ultrasound of the baby can help too. Combine all 3, and you've got a pretty good guess of the due date.
2007-02-03 16:44:23 · answer #3 · answered by Dani 5 · 0⤊ 0⤋
It's just an educated guess. They ask you for the first day of your last period and add 40 weeks to that. It's not an exact science otherwise they'd have women making appointments to go to the hospital on their due date. That's why so many women think it would be ideal if we could have c-sections on demand, set a date and a time and go have that baby! I love that idea, had c-sections myself and after the first one they let me pick the date of the next deliveries. It was major surgery and it sucked, but at least I got to make the plans of when I was going to have my kids.
2007-02-03 16:10:43 · answer #4 · answered by wwhrd 7 · 0⤊ 0⤋
I was taught in school you count back 3 months from the date of the start of you last menstrual period. Then add 7 days, this is your estimated due date.
2007-02-03 16:07:45 · answer #5 · answered by lrna83 2 · 0⤊ 2⤋
They count 40 weeks from the first day of your last period. When they do the first ultrasound they can get more of an exact date.
2007-02-03 16:07:58 · answer #6 · answered by Anonymous · 1⤊ 0⤋
By the first day of your last mentral cycle. If you go in to see the doctor late, and you dont remember when your last cycle was, they will measure your baby from an ultrasound, and measure the size of your uterus. (Which is less accurate than knowing when your last mentral date was)
2007-02-03 16:07:11 · answer #7 · answered by BlueAngel 1 · 1⤊ 0⤋
sure, relatively. With my first being pregnant, I already knew the suitable date b/c my husband have been out of city for artwork and there became into in basic terms sooner or later in a three week era that it could have befell. this is the suitable date the ultrasound tech gave me as my concept date after my ultrasound.
2016-10-01 09:44:49 · answer #8 · answered by koffler 4 · 0⤊ 0⤋
By the date of your last period or by the size of the fetus.
2007-02-03 16:07:31 · answer #9 · answered by pixiestarr44 1 · 2⤊ 0⤋
By the first day of your last period or ultrasound
2007-02-03 16:04:54 · answer #10 · answered by J&A 3 · 0⤊ 0⤋