An 18 month old should be able to speak at least 6 words, and should be able to communicate using familiar gestures, such as shaking his or her head, nodding his or her head, and pointing.

Pregnancy is technically only possible during the five days before ovulation through to the day of ovulation.

Most experts think that several factors, including genetics, could play a role. Women with PCOS are more likely to have a mother or sister with PCOS.

Eggs that become damaged or develop chromosomal abnormalities cannot sustain a pregnancy.

Egg quality declines significantly in the late 30s and early 40s.

Chronic infections in the cervix can also reduce the amount or quality of cervical mucus, the sticky or slippery substance that collects on the cervix and in the vagina. Reduced amount or quality of cervical mucus can make it difficult for women to get pregnant.