I talk a lot in the podcast about why an animal would want to plan when to give birth, but one thing that didn’t make it into the episode is the fact that a number of species can get inseminated while still suckling their babies, then get pregnant after those babies are weaned. A lot of human mothers think that they experience the same thing—that as long as they’re breastfeeding, they can’t conceive again. But that’s a total myth. It’s true that breastfeeding can affect your fertility, and so some women can have unprotected sex without much risk of pregnancy. But it’s also true that plenty of women are absolutely able to get pregnant even while regularly nursing—and that every year, tons of people end up having their second kid earlier than planned because they didn’t realize that fact. So, consider this your fair warning, and check out this week’s episode to hear about the animals who have a way better handle on the whole conception thing than humans do. For more stories about weird animal baby-making, listen to our previous episode about virgin births (yes, they’re a thing).