Yes, we all know there is more to conception than the birds and the bees, but most of us don't stop and think about the science of it. As anyone who has had trouble conceiving knows, it's complicated.
Doctors usually calculate the start of pregnancy from the first day of your last menstrual period. This is called the menstrual age and is about two weeks ahead of when conception actually occurs. Do you know what happens next? Take my quiz and find out!