<Tr> <Th_colspan="2"> Hormonal Contraception </Th> </Tr> <Tr> <Th_colspan="2"> Background </Th> </Tr> <Tr> <Th> Type </Th> <Td> Hormonal </Td> </Tr> <Tr> <Th> First use </Th> <Td> 1960 </Td> </Tr>

Where do the hormones in birth control come from