While there has been a big jump in the number of single women accessing fertility treatments to become pregnant, the numbers are still relatively small.

"If you're pregnant or trying to become pregnant, and taking one of these medications, it may be worth talking with your physician to make sure you're taking the best medicine for your needs, while minimizing risk to future children."

Among them: Getting Californians of child-bearing age to fill out a new questionnaire to assess their risk of pregnancy complications, even before they become pregnant.

That could reflect the cases of women who conceived right around the time of the Dobbs ruling — before they had a chance to reconsider whether to become pregnant and before they could come up with ways to work around the ruling, Singh said.

Infant mortality rates were back within the normal range a year after the ruling, which may indicate that the pool of people willing to become pregnant had changed in response to the newly restrictive landscape.