>>>>Mother-to-be, pregnant woman, expectant woman
>>>
>>>These are descriptions, not single words.
>>
>>As you may have heard recently, the hyphen is an endangered species, and its use is declining: heartbeat, today, nevertheless, inasmuch, et al (sure, not all necessarily originally hyphenated). I assume you have no objection to typical German portmanteau wordss (motormekaniken, for ex.), so why not "mothertobe"?
>
>Hey, it's your language, why not? Then you'd have A word.

There probably IS a latin-based medical word for one, just as a 3-month period is a trimester, the monthly equiv of an anniversary is a mensaversary, etc.

BTW, other terms for "pregnant" are "bun in the oven", "up the duff" (Br), et al.