How is Gestational Age Calculated?
|Gabriel at 8 weeks past LMP (6 weeks after conception)|
Here is the text that has everyone up in arms, from HB 2036:
4. "Gestational age" means the age of the unborn child as calculated from the first day of the last menstrual period of the pregnant woman.
I've been pregnant six times, and every care provider I've ever seen (two different OBs and a midwife, in two different states) has calculated pregnancy this way. In fact, with Gabe it was a bit of an issue because I insist on calculating my pregnancies based on conception date since I have long cycles, and the medical assistant at my OB's office only knew how to calculate gestation based on LMP (last menstrual period). But hey, don't take my word for it:
- Calculating the day your baby begins to develop and keeping track of your pregnancy dates can be a challenge. The development of pregnancy is counted from the first day of the woman's last normal menstrual period (LMP), even though the development of the fetus does not begin until conception, which is about two weeks later. - American Pregnancy Association
- In the UK pregnancy is calculated from the first day of the woman's last period so for as much as three weeks of this first month she might not be actually pregnant. - BBC News
- The average length of a pregnancy is 40 weeks, or 280 days, from the first day of the last normal menstrual period. - Discovery Health
- Pregnancy is measured using “gestational age.” Gestational age starts on the first day of a woman’s last menstrual period (LMP). - Planned Parenthood
Yes, that's right - Planned Parenthood determines gestational age in the exact same manner as stated in HB 2036! Bet HuffPo missed that little factoid.