third trimester
second trimester
first trimester
labour
parity
full term
monther
fertile period
fertile phase
bimester
midgestation
term
neonate
newborn
preterm baby
term infant
premie
premature infant
preterm infant
premature baby
fourth trimester
preemie
postmaturity
due date
premature labour
calendar
Friedman unit
premature labor
deadline
quadrimester
rhythm
preovulation
calendar method
rhythm method of birth control
calendar method of birth control
rhythm method
puerperium
trimester
prebirth
semester
diaperhood
polymenorrhea
fetal age
gestational age
fertilization age
periovulation
gestation period
gestation
expected date of confinement
premature birth