Zygote is the diploid cell that results from the fertilization between an egg and a sperm. Etymology. Came from the Greek word âgametesâ meaning âhusbandâ and âgameteâ meaning âwife.â. Came from the Greek word âzygotosâ meaning âjoined or yoked or to yoke.
This is not causation, but facilitation after the fact. Stating that estrogen causes breast cancer is like saying fertilizer causes weeds. In a garden even weeds need some soil nutrients, and if these are completely removed, the weeds can't grow...but neither can the desired plants.
Weâve known for several years that long-term use of estrogen plus progesterone increases breast cancer risk. But this study shows that taking estrogen alone also does so. (Unless youâve had a hysterectomy, taking estrogen alone raises the risk of endometrial cancer; progesterone is added to lower that risk.