8-12 weeks Fetal heart tones can be heard by Doppler. Baby's gender can be seen. The fetus begins to resemble a human baby. 20 weeks Baby weighs about one pound. Heartbeat can be heard with fetoscope.
Mother feels movement.
24 weeks Baby can breathe. Baby is two thirds of its final size. 28 weeks Eyes can open and close. 32 weeks Baby has fingernails and toenails. Baby starts to gain weight.