When Are We Expecting?
How is a pregnancy due date calculated? My wife and I are trying to determine when we conceived our baby.
-James from Newport Beach, CA
This is a good question. Our due date for wee Mac was moved up a week, leaving me to wonder where my wife was the week before I thought we conceived. Luckily she was not at the NBA All-Star game in Los Angeles – thus I don’t have to worry about pulling an Earl Hickey come August 21st. But here is the skinny: Very few expectant moms know exactly when they conceived. Most people just estimate. Human gestation is the same for everyone: It takes about 38 weeks from the day of conception to the day you deliver. The method typically used by healthcare providers is simply to count from the first day of your last period. For women with a menstrual cycle of average length, that day is usually about two weeks before conception, which explains why pregnancies are said to last 40 weeks. Make sense? My Name is DaftDaddy.