I think kegamine is pointing to the grammatical oddity of using the singular "woman" in the title, rather than the plural "women":

  Pregnancy alters woman's brain

The article introduction phrases this in a little more concise a way:

  Pregnancy reduces grey matter in specific parts of a woman's brain

I can see how the introduction probably became contracted to form the title, but in the contracted version, the plural "Pregnancy alters women's brain" would seem a little more grammatically precise than "Pregnancy alters woman's brain".

It would have been interesting to also compare women pregnant with their second child. Is this phenomenon only seen in first time mothers?

> Stop trolling

Whoa. That's uncivil and a borderline personal attack, which isn't allowed on HN. Please assume good faith when commenting here.

On HN we frequently ask for titles to be altered for accuracy. I would expect a BBC journalist to understand the difference between singular and plural. "Woman's brain" and Women's brains" have different meanings, at least for this speaker of English.