06/15/2026
Quick, (don’t cheat!) before you read the caption, drop your guess in the comments! How many weeks would you guess this baby was?
This creamy white coating is called vernix. It protects baby’s skin throughout pregnancy and continues supporting the transition to life outside the womb after birth. It’s antimicrobial, helps regulate temperature, and acts as a natural moisturizer for newborn skin.
Interestingly, vernix can also give us clues about gestational age. In general, babies born earlier tend to have more vernix, while babies born later tend to have less, as it’s gradually absorbed into the skin and shed into the amniotic fluid as pregnancy progresses.
Of course, vernix is just one piece of the puzzle. But after attending enough births, you start to notice that babies often corroborate what their mothers have been saying all along.
This baby?
“42+2” by ultrasound 👀
One of many reminders that while ultrasound can be a valuable tool, it’s still just one piece of the puzzle. As a midwife who builds such deep trust with my families, I tend to put a lot more stock in cycle tracking, conception dates, and mothers who know their bodies well.