Several different hormones play roles when it comes to a woman’s fertility. If certain hormones don’t do their job or aren’t present in high enough amounts, it can be unlikely or even impossible for a woman to be able to conceive. In fact, many times women experience issues with fertility just because of a problem with a hormone. Some fertility treatments work specifically by injecting hormones or by stimulating certain hormones. Of those hormones, one of the most significant in terms of getting pregnant is progesterone.

One of the things that progesterone does for you in terms of fertility is to help with the uterus. Specifically, progesterone helps to make sure that the uterine lining is strong enough for a fertilized egg to implant.

Progesterone levels tend to increase when an egg implants. The hormone also causes your Basal Body temperature to increase, which is why many women who are trying to conceive also test their Basal Body temperature. This helps her know when she has ovulated, in addition to tracking other signs such as changes to cervical mucus.

Once a fertilized egg implants in the uterus, it is the placenta that will take the task of keeping the uterine lining intact. Your progesterone levels will usually drop back down to normal once this happens. It can take about ten weeks into your pregnancy before your progesterone levels will drop. If your progesterone levels were to drop to drastically during that time, it’s possible that you would experience a miscarriage.

Pregnancy hormones are something of an interconnected system. Follicle Stimulating Hormone helps to produce estrogen, which helps to produce luteinizing hormone, which helps to produce progesterone. In many ways, progesterone is one piece of a hormonal cycle that, ultimately, is reflected in your monthly ovulation and menstrual cycle.

There are a number of ways that you may be able to increase your progesterone levels. The fertility medication Clomid can help to increase progesterone. There are a number of creams on the market that may help with progesterone production. If you’re concerned about your progesterone levels, you should talk to your doctor about the situation.