2006-10-18 20:14:40 · 5 answers · asked by johny g 1 in Health ➔ Women's Health
To calculate the age of the fetus, you need to remember the date of your last menstrual period. From there you can count the fetal age by weeks.
If you want to know when is your due date just subtract 3 mos and add 7 days.
For example:
Last menstrual period date-04/02/ 2006
4-3=1
2+7=10
1/10/2007 -Due date
Good day!
2006-10-18 20:34:11 · answer #1 · answered by Yu S 2 · 1⤊ 0⤋
Doctors count from the last period. So, a four week fetus is actually only about two weeks old really. This is because pregnancy happens during or after ovulation which occurs 2 weeks after the first day of a women's period.
The last period is used because it is a date women know and remember. Many women do not know when they ovulate.
2006-10-19 03:19:36 · answer #2 · answered by ineedonebuddy 3 · 0⤊ 0⤋
Last period. Suppose a couple had intercourse three or four times during her fertile period. How would anyone be able to tell which encounter resulted in the pregnancy?
2006-10-19 03:17:38 · answer #3 · answered by Richard B 7 · 0⤊ 0⤋
They go by the date of your last period. They measure your uterus too by cm. each cm symbolizes a week of gestastion. But they will ask you the first day of your last period and that is when your egg is suseptable to being fertilized. hope i was of help.
2006-10-19 03:26:50 · answer #4 · answered by amandaped25 4 · 0⤊ 0⤋
i am not sure... so sorry.
2006-10-19 03:22:21 · answer #5 · answered by Alen 4 · 0⤊ 1⤋