Pregnancy Week by Week

Your complete 40-week pregnancy journey. Track fetal development, symptoms, body changes, and connect with your baby through daily voice notes.

First Trimester

Weeks 1-13

The foundation — your baby's heart, brain, and organs begin forming. Morning sickness and fatigue are common.

Second Trimester

Weeks 14-27

The golden period — you feel the first kicks, symptoms ease, and your baby grows rapidly.

Third Trimester

Weeks 28-40

The final stretch — your baby gains weight, practices breathing, and prepares for birth.

Track your pregnancy with daily voice notes

While tracking your pregnancy week by week is exciting, nothing compares to hearing your baby's voice every morning. Baby Whispers sends daily AI-generated voice notes personalized with your baby's nickname — evolving through each stage of your pregnancy.

From “hello world” in week 5 to “I can't wait to meet you” in week 40 — every message is unique, emotional, and beautifully real.

Start free trial — hear your baby's voice →

Free Pregnancy Tools

Specialized Guides

Frequently Asked Questions

How is pregnancy counted week by week?

Pregnancy is counted from the first day of your last menstrual period (LMP), totaling 40 weeks. This means week 1-2 occur before conception actually happens.

When should I start tracking week by week?

Start as soon as you know you're pregnant. Early tracking helps you understand fetal development, prepare for appointments, and bond with your baby.

Are all pregnancies exactly 40 weeks?

No — only about 5% of babies arrive exactly on their due date. A full-term pregnancy ranges from 37-42 weeks.