I mean, back in those times, the medical profession knew nothing of female anatomy because it was considered immoral. Heck, even sofas were considered slightly titillating because they resembled a bed more than an armchair, a yet most people had children, especially peers and whatnot. So how did they deal with it? Was the expectant mother banished from society until her baby could be given to a nanny? Or did everyone do the British thing and pretend that they didn't notice Mum-to-be's expanding midriff?
There's a big problem with the premise of your question, in that the Georgian era (1714 to, arguably, the accession of Victoria in 1837) and the Victorian era (1837-1901) saw huge changes and cannot really be tied together in terms of social attitudes in any meaningful way. In comparison to the Victorian era, the Georgian was brutally honest about the realities of sex, pregnancy, prostitution, etc. And even in the Victorian, the medical profession certainly didn't hesitate to study female anatomy, even if doctors were sometimes still wrong about its functions. In neither were sofas really considered titillating.
I have an answer that speaks directly to women existing outside the home during Victorian pregnancies: During the time of corsets and tight waisted dresses for women what would they wear during pregnancy?
There is also a discussion of how Victorians spoke about pregnancy in How did polite Victorian ladies refer (even among themselves) to a late or missed period? And a short discussion on the same topic in the short answers thread.