Ultrasound detection of an intrauterine sac and fetal cardiac motion also constitutes positive proof. The pregnant woman usually begins to feel fetal movement between 16 and 20 wk. Pregnancy is considered to last 266 days from the time of conception or 280 days from the first day of the last menstrual period if periods are regular at 28 days. Patients should be told that delivery up to 2 wk earlier or later than the estimated date is normal. A pregnant woman is described as a gravida.
Parity describes outcome.
The sum of para and abortus equals gravidity. All rights reserved.