Companies have increasingly offered generous fertility benefits to attract and keep top-notch workers. Now, the federal government is getting in on the act. Starting this year, federal employees can choose plans that cover several fertility services, including up to $25,000 annually for in vitro fertilization procedures and up to three artificial insemination cycles each year.

With about 2.1 million civilian employees, the federal government is the nation's largest employer. Now, just as businesses of every stripe prioritize fertility benefits, in vitro fertilization — a procedure in use for more than 40 years — has become a tricky topic for some anti-abortion Republican members of Congress and even presidential candidates.

It was inevitable that disagreements over IVF among abortion opponents would eventually break into the open, said Mary Ziegler, a legal historian and expert on reproductive health.