The second trimester often brings a gentle shift in how you experience pregnancy, and Week 15 is a wonderful example of this unfolding. Many parents-to-be find a little more ease and energy as some of the intense first-trimester symptoms begin to fade. It's a lovely time to lean into curiosity about the changes happening within you and with your baby.
What's happening with baby
Around Week 15, your baby is making incredible strides in development, now roughly the size of an apple. One of the most remarkable developments this week is their ability to hear. While it's still muffled, they can pick up sounds from the outside world, like your voice and your heartbeat. Their tiny bones are continuing to harden, a process called ossification, and their muscles are becoming stronger, leading to more coordinated movements. Delicate lanugo, a fine, soft hair, might be starting to cover their body, which helps regulate temperature in the womb.

