Four-month-old babies may using crying to demonstrate when they need something. They are able to recognize signs of hunger, discomfort, such as bored or wet diapers, or when they are sleepy.

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.

PCOS is the most common cause of female infertility.

With PCOS, women typically have high levels of androgens. These are sometimes called male hormones, though females also make them.

Blocked or damaged fallopian tubes prevent eggs from getting to the uterus and sperm from getting to the egg. Leading causes include pelvic inflammatory disease, sexually transmitted diseases such as chlamydia, and previous sterilization surgery.

Some STDs like gonorrhea and chlamydia can cause infertility by blocking the epididymis or tubes.