All the same, I was happy to see that birth control was included - yay for not assuming that time-travelers will be men!
You can apparently get progesterone precursors from a species of Mexican yams (or the source for the original synthesis, sasparilla), and estrogens from pregnant mare's urine, but I think the effectiveness of hormonal birth control is pretty dependent on the precise dose and the mix of particular progestogens/estrogens/other byproducts you end up with. Not sure I'd want to chance it.
Instructions for making condoms, diaphragms, and spermicides would be more useful.
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You can apparently get progesterone precursors from a species of Mexican yams (or the source for the original synthesis, sasparilla), and estrogens from pregnant mare's urine, but I think the effectiveness of hormonal birth control is pretty dependent on the precise dose and the mix of particular progestogens/estrogens/other byproducts you end up with. Not sure I'd want to chance it.
Instructions for making condoms, diaphragms, and spermicides would be more useful.
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