We've written before about the Pregnant Workers Fairness Act, which requires employers with 4+ employees to provide pregnant workers with reasonable accommodations for their pregnancy, child-birth, or pregnancy/child-birth related medical conditions (like, say, gestational diabetes). Such accommodations might include more frequent breaks, not having to lift heavy things for a few months, or taking some time to recover from child birth. The Act goes into effect today. It may be surprising to realize that federal law doesn't require employers to provide pregnant women with any accommodations for pregnancy or child birth. Unless a pregnant worker has some other disability, under federal law employers are free to require them to stand all day without bathroom breaks and to come back to work the day after the baby is born.
This is due to a gaping hole between the Pregnancy Discrimination Act and the Americans with Disabilities Act. The Pregnancy Discrimination Act defined discrimination against women to include discrimination against pregnant women. That is, discrimination against someone for being pregnant is the same as discriminating against women.
This makes a certain amount of sense -- only women become pregnant, many of the reasons that people discriminate against women has to do with the possibility of them becoming pregnant, and many of the reasons people discriminate against pregnant workers has to do with people's stereotypes about women (i.e., that they'll become mothers and then give up on work).
The problem is that pregnant women need certain accommodations that other women don't -- like frequent rest breaks, or restrictions on how much they can carry. The only federal law that might require an employer to offer these kinds of accommodations is the Americans with Disabilities Act. But in order to get accommodations under the ADA, you have to be disabled. The law doesn't define pregnancy or childbirth as disabilities, meaning accommodations someone needs related only to pregnancy or childbirth aren't covered by the ADA.
New York City, joining in with many other localities, like the state of California, is filling in the gaps and providing its pregnant residents with better protections. Under the New York City law, employers with 4+ employees must provide reasonable accommodations for pregnancy, child birth, or related medical conditions. "Reasonable accommodation" is a bit of a term of art, but it essentially means that the employer has to provide accommodations to help the employee do their job so long as the accommodation does not constitute an "undue hardship" on the employer. If you are pregnant and your employer is refusing to accommodate your pregnancy, child birth or related medical condition, contact a lawyer.