Week 17: Baby Is Practicing Sucking and Swallowing

Your baby is practicing the sucking and swallowing reflexes that will be essential for feeding after birth — swallowing small amounts of amniotic fluid is part of this process and also supports the developing digestive system.

Brown fat, which helps regulate body temperature, is starting to form beneath the skin. This is different from the white fat that develops later and provides energy reserves.

The umbilical cord is growing thicker and stronger to support increasing nutrient and oxygen transfer between you and your baby.

Your uterus is now about the size of a large grapefruit and continuing to rise. Many women notice their balance shifting slightly as their center of gravity changes, requiring a bit more care with movement.

Common at week 17:

• More pronounced bump
• Possible early flutters of movement
• Increased appetite
• Leg cramps, especially at night
• Mild shortness of breath with exertion as the uterus pushes up slightly on the diaphragm

Magnesium and potassium, found in bananas, leafy greens, and nuts, may help reduce leg cramps that become more common in the second trimester. Staying well hydrated also plays a role.

Calf stretches before bed can help reduce nighttime leg cramps. Gentle, consistent movement throughout the day also supports circulation, which can ease cramping.

This week, consider:

• Mentioning frequent leg cramps to your doctor, who may suggest dietary adjustments
• Continuing to monitor for regular fetal movement as it becomes more noticeable
• Reviewing your insurance coverage for upcoming delivery costs if applicable

Your fundal height (the measurement from your pubic bone to the top of your uterus) will likely start being tracked at each visit from around now onward, as a simple way to monitor your baby's growth between ultrasounds.