The onset of the menstrual cycle at puberty around 11-13 years of age is termed menarche, while its cessation around 48-50 years is called:

1. Menarche is the first onset of the menstrual cycle at puberty (about 11-13 years). 2. The menstrual cycle ceases around 48-50 years of age. 3. This cessation is called menopause. 4. Ovulation is egg release, gestation is pregnancy, and implantation is attachment of the blastocyst, so they are ruled out. _Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 17 Reproduction in Plants and Animals "Menstrual Cycle-Process of Ovulation", p.258_