Morning sickness can occur at any time of the day, morning, afternoon or night.

A one year olds leg muscles should have developed enough for them to stand on them, with help for balance. Their legs should be able to support their weight. A one year old may be able to take steps between pieces of furniture, holding on to them for support, stand along without help for a short time, or take several small steps on their own.

Because sperm can survive in the fallopian tubes for up to a week, you don't have to time sex to the exact moment you ovulate to get pregnant. This window includes the five days before and the day of ovulation itself.

Reduced production of FSH will affect the numbers of sperm produced.

Antibiotic treatment may cure an infection of the reproductive tract, but doesn't always restore fertility. Your doctor may recommend hormone replacement or medication in cases where infertility is caused by high or low levels of certain hormones or problems with the way the body uses hormones. A varicocele can often be surgically corrected or an obstructed vas deferens repaired.

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