During the fifth month of development, a baby grows considerably, ending the month somewhere around 7 ounces, according to WebMD. During this month, the baby develops the ability to yawn, stretch, make facial expressions and hiccup. Eyes are sensitive to light, and when a light is shone on the stomach, the baby turns away to shield her eyes.
During the fifth month, the gender of the baby is possible to determine, as sexual organs are visible when she is situated in the right position, according to WebMD. During a routine ultrasound, she is measured to assess fetal growth and development and to verify the due date. In most cases, a baby's movements are felt readily, the mother's uterus is about the size of a cantaloupe and the pregnancy is very visible, if it was not previously.
Taste buds develop during the fifth month and the baby can decipher between sweet and bitter tastes, according to WebMD. While her rapid growth spurt tapers off this month, her reflexes continue to strengthen and grow. Her skin is developing and is transparent at this point with red blood vessels below the skin easily viewable. The thin, white protective coating, called vernix, begins to develop toward the end of the fifth month.