Normally identified as the period between the conception and the birth of a baby. The average or normal gestational age of a mature fetus at birth is around 40 weeks. Gestational age categories include: preterm - less than 37 weeks; term - 37 to 42 weeks; post term - greater than 42 weeks.
Duration of time that a fetus has spent developing in the uterus. Estimated using the date of the mother's last menstrual period (LMP), or by ultrasound of the unborn fetus. The gestational age of a newborn infant can be estimated by careful physical examination and scoring of certain criteria (Dubowitz or Ballard exam).
Gestational age is basically a measure of the length of time that a baby spends in the womb. The baby's age is calculated in weeks as the time from the first day of the mother's last menstrual period to the day of birth
The number of completed weeks that have elapsed between then first day of the last menstrual period and the date of delivery, irrespective of whether the gestation results in a live birth or a fetal death.
Gestational age, also known as menstrual age, is the age of an embryo or fetus (or newborn infant). It is most commonly calculated from the start of the woman's last menstrual period. Gestational age is approximately two weeks older than when fertilization took place (i.e. two weeks more than the developmental age).