At 18 months, a baby should enjoy playing with toys, other children, and adults they are familiar with. They may mimic the actions of others, such as feeding baby dolls, rolling toy trucks on the floor, or flipping the pages of a book.

Any of these signs indicate that your baby may be struggling to breathe. Keep in mind babies do breathe faster than adults and children, but breaths that occur at a rate of more than 60 per minute are concerning.

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.

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.

Varicoceles, enlarged veins in the scrotum, may also affect sperm production.

Some of the most common side effects of pills are bleeding between periods (most often with progestin-only pills), breast tenderness nausea and vomiting. They usually clear up after two or three months.