Though it may be referred to as the pregnancy line, its more technical label is linea nigra. Around three quarters of pregnant women will manifest a linea nigra, which is a brownish stripe that runs vertically down the stomach. There exact cause of this mark has not been ascertained, and it will typically manifest around the fifth month mark, though it can develop later.

Infants may urinate as often as 1-3 hours or as infrequently as 4-6 hours. Contact your doctor for recommendations on how to make sure your baby is hydrated, and how to monitor for illnesses or infections.

Some women feel ovulation as one-sided backache or a tender area. The condition, called mittelschmerz, may last anywhere from a few minutes to a few days.

The risk of high blood pressure during pregnancy is about double for women over 35 compared with younger ones; hypertension affects about 10 to 20 percent of pregnant women in this age group. Gestational diabetes is two to three times more common in women over age 35 than in younger women, and recent studies show the risk is even higher if the woman has gained weight over the years. Age 35 to 39 is also when women are most likely to have twins.

Causes of implantation failure include  genetic defects, thin endometrium, embryonic defects and endometriosis.

POI is a condition in which a woman's ovaries stop producing hormones and producing eggs at a young age.