The normal duration it takes for the development of the fetus from the time of fertilization in the womb of its mother is called the gestation period . In humans, the gestation period is for about 9 months or approximately 280 days. It is calculated from the incipience of their last menstrual period . As per studies, a mere 4% of women deliver in this duration and around 68%-70% deliver within 10 days of their estimated due date. As per recent research, the average time from ovulation to birth ... What is gestational age ? Learn how to count the weeks of gestation from the date of your last period to your due date. Learn what gestation period means, how long it lasts in humans and other animals, and what happens during the fetal development stages. Find out how to monitor your gestational age and ensure a healthy pregnancy. The gestation period in humans refers to the time a fetus develops inside the mother's uterus, from conception until birth. On average, the human gestation period lasts for about 280 days, which is equivalent to 40 weeks or approximately 9 calendar months.
