Fertility and Infertility

Endocrine disrupting chemicals: Is your home making you sick?

Obesity, type 2 diabetes, and some cancer rates are on the rise in humans. While sperm count and fertility is on a downward slide in some populations. What if chemical exposure was partly responsible for these trends?

One hypothesis is that a group of chemicals — known as 'endocrine disrupting chemicals' (EDCSs) — could affect human reproduction, puberty, metabolism and other functions controlled by hormones in our endocrine system.

Many suspected EDCs are already in your home — but how much risk do they really pose? At what exposure level do they become unsafe?

Can you get pregnant during a pregnancy?

The technical term for this is superfetation. In humans, it's possible, but it's very uncommon.

Two thousand years ago, that great Greek thinker Aristotle wondered about this very topic, specifically as regards the hare.

Aristotle noticed that when a hare gave birth, quite often the offspring in a single litter would fall into two distinct classes: there would be a bunch of full-sized robust baby hares, and another bunch of scrawny frail baby hares.