In women, progesterone levels are relatively low during the preovulatory phase of the menstrual cycle, rise after ovulation, and are elevated during the luteal phase, as shown in diagram below. Progesterone levels tend to be < 2 ng/ml prior to ovulation, and > 5 ng/ml after ovulation.
Results for this Gallup poll are based on telephone interviews conducted Aug. 7-Dec. 29, 2013, on the Gallup Daily tracking survey, with a random sample of 3,445 adults, aged 18-34, living in all 50 U.S. states and the District of Columbia, who report they are currently living at home with their parents.
One in nine Americans lost a parent before they were 20 years old, and for many of them, this sort of question has been in their heads ever since. I'd give up a year of my life for just half a day with my parents, says Jonathan Herman, a 33-year-old health-care executive in New York. He lost both his parents to cancer before he was 13. I've had friends complain that they have to drive to see their parents for Thanksgiving, he says.