A baby should produce its first genuine smile around the age of 2 months. The smile is often a response to affection or positive attention from a caregiver they are attached to.

If you're newly pregnant, it's not uncommon to feel repelled by the smell of a bologna sandwich or a cup of coffee, and for certain aromas to trigger your gag reflex. Though no one knows for sure, this may be a side effect of rapidly increasing amounts of estrogen in your system. Shortly after you become pregnant, hormonal changes prompt a chain of events that raise the rate of blood flow through your kidneys. This causes your bladder to fill more quickly, so you need to pee more often. One of the early signs of pregnancy is sensitive, sore breasts caused by rising levels of hormones.

As a medical diagnosis, advanced maternal age serves as a heads up for healthcare professionals. It simply means the woman is 35 or older, which could make getting pregnant problematic. Or, if she is already pregnant, she or her baby might be more prone to certain risks.

An over-the-counter ovulation prediction kit — a test that you can perform at home — detects the surge in luteinizing hormone (LH) that occurs before ovulation.

Birth control shot releases a hormone — progestin — into the body. Progestin works by keeping eggs from leaving the ovaries. Pregnancy cannot happen if there is no egg to join the sperm.

The pill have been the most commonly used method since 1982.