"In a joint appearance, Chelsea and Hillary Clinton announced Thursday that Chelsea is expecting her first child later this year."
“Marc [Mezvinsky] and I are very excited that we have our first child arriving later this year, and I certainly feel all the better — whether it’s a girl or a boy — that she or he will grow up in a world full of so many strong young female leaders, so thank you for inspiring me and thank you for inspiring future generations, including the one that we’ll be lucky enough to welcome into our family later this year,” Chelsea Clinton said. “I just hope that I will be as good a mom to my child, and hopefully children, as my mom was to me.”
"According to David Haig, an evolutionary biologist at Harvard, babies don't want additional siblings competing for their parents' love. "I'm just suggesting that offspring have evolved to use waking up mothers and suckling more intensely to delay the birth of another sibling," said Haig. He encourages parents to train their babies to sleep through the night."