"I'm 35, so we may have missed our chance to have a big family. We always talk about adoption and doing it when our child or children are a little older," she said.
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Those two sentences unleashed a commotion of emotions. Some fans were supportive and lauded her openness. Others encouraged her to keep trying. The "Cry Pretty" singer is married to Mike Fisher, 38, and they share one child together, Isaiah, 3.
But — wow — others took her comments personally, seeming to say keep your opinions about your ovaries to yourself.
More women 35 and older are having children
More women ages 35 and older are giving birth, according to Centers for Disease Control and Prevention health statistics.
But it's also well known that fertility problems increase with women 35 and older, who the medical industry refers to as those of "advanced maternal age," formerly known as — shudder — "geriatric pregnancy."
About one-third of couples in which the woman is older than 35 experience fertility problems, according to the Office of Women's Health in the U.S. Department of Health and Human Services.
Some fans came to Underwood's defense following the backlash, effectively saying lay off.