Slide show: What a newborn really looks like
Fluid-filled sac surrounding a newborn's testicle (hydrocele)
Previous Next 5 of 7 Your newborn's breasts and genitals

Before birth, the mother's hormones pass through the baby's system. This can lead to swollen breasts at birth — for both boys and girls. Swelling can last up to several weeks.

Newborn girls might have a harmless vaginal discharge for several days as well.

Some newborn boys develop a fluid-filled sac surrounding a testicle that results in swelling of the scrotum, the loose, skin-covered bag underneath the penis. This condition, known as a hydrocele, usually disappears on its own within a year.

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