To determine when these milestones occur in terms of fertilization age, simply subtract approximately two weeks from our week by week pregnancy development guide. Thus fertilization age is slightly less accurate than gestational age, and most doctors don’t use it themselves.įor purposes of convenience, the dates in this development guide use gestational age as a milestone. However, every woman’s cycle is different. Because most women ovulate (release an egg into their womb from the ovary) in the middle of their menstrual cycle, fertilization age is typically about 14 days later than the gestational age. In fact, gestational age can start up to two weeks before the moment of conception.įertilization age, on the other hand, refers to how long it has been since the actual event of conception: the fertilization of an egg by sperm. Gestational age can be misleading, however, because it doesn’t give the actual age of the growing baby itself. In most visits to a prenatal doctor, he or she will refer to the age of a fetus in gestational terms. Gestational age refers to the amount of time that has passed since the first day of the mother’s last menstrual period.
In medical circles, there are two common methods used to give a fetus’s age – gestational age and fertilization age. This might seem like a simple question to answer, but it’s actually a little tricky to figure out where to start counting when you give the age of a fetus.
Curious to learn more about the development of a child inside the womb? Keep reading! This blog post will tell you about the process of fetal development from conception to birth, so you can understand what’s happening throughout the process.
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