If the core of a supernova explosion contains three or more solar masses of matter, the core will most likely become a protostar red dwarf white dwarf neutron star black hole

a time line cause it goes from 685 to 978

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.