For nurse practitioners, the average number of years in practice decreased from 9.3 in 2012 to 8.9 in 2013, indicating an increasing number of new graduates entering the profession. For physician assistants, that number dropped from 12.37 years in 2012 to 11.97 in 2013, a 3.23% decrease.
â¢ GESTATION (noun). The noun GESTATION has 3 senses: 1. the period during which an embryo develops (about 266 days in humans). 2. the state of being pregnant; the period from conception to birth when a woman carries a developing fetus in her uterus. 3. the conception and development of an idea or plan.
WEEK BY WEEK CHANGES. Gestation is the period of time between conception and birth when a baby grows and develops inside the mother's womb. Because it's impossible to know exactly when conception occurs, gestational age is measured from the first day of the mother's last menstrual cycle to the current date.