A nurse is teaching about fetal development to a group of clients in the antenatal clinic. Which of the following statements should the nurse include in the teaching?

"You will first feel your baby move in week 24 of pregnancy."

"The baby's heart beat is audible by a Doppler stethoscope at 12 weeks of pregnancy."

"Very fine hairs, called lanugo, cover your baby's entire body by week 36 of pregnancy."

"The sex of the baby is determined by week 30 of pregnancy."