How does history support the birth of 100 kauravas, birth of 1000 brothers of rishi Bharadwaja, while women have their periods only for 30 years of their lives? That means at maximum she can give birth to 30 children.

Funny question :) Some real live example - https://en.wikipedia.org/wiki/List_of_people_with_the_most_children 1. 100 Kauravas (101 actually, 100 sons and a daughter called Dushala): - some say that these were test-tube babies - https://www.quora.com/Mahabharata-Hindu-epic-How-did-Dhritarashtra-have-100-children - some say these were kids of the dasi(servants) hence dasi-putras of Dhritarashtra 2. Birth of 1000 brothers of rishi Bharadwaja. These are possible using the following function given that the kids were born humanly : * Recently recorded data shows possibility of Nonuplets i.e. 9 kids - https://en.wikipedia.org/wiki/List_of_multiple_births (1) (1) (9) * (30) = 270 are possible . (1) (1) (4) * (30) = 120 can be relatively acceptable possibility. Gandhari might come under this exception :P. But more logical explanation is multiple parents under patronage of a single couple.