Explanation:
Pregnancy is the state of carrying a developing embryo or fetus within the female body. It occurs after fertilization of an egg by sperm, leading to the formation of a zygote, which then implants itself in the uterus. Pregnancy typically lasts about 40 weeks and is divided into three trimesters.
Periods, also known as menstruation, are a part of the menstrual cycle experienced by females. It involves the shedding of the uterine lining that occurs roughly every 28 days, although this cycle length can vary. Menstruation usually lasts for a few days and is a natural process that indicates a female's reproductive system is functioning properly.
