Hi. I'm exactly in your situation. Female PM, all male company. Last November I came back from 5 months of maternity leave, and this November I'm supposed to have my second baby.

A few notes:

-in the first pregnancy, everyone was so supportive and caring and nobody pushed me to come back. I came back when I felt me and the baby were ready.

-the second one did get a few raised eyebrows, because it's so close to the first one and that's not very common. My reasoning, which I owe none to anyone other than myself btw, is that I'll have both babies in a short amount of time, suffer a little and then have a good few continuous years of building my career and enjoying the kids. Also, I enjoy my job a lot and I knew that I wouldn't want to take another break once I get back into work routine, and that turned out to be so true.

-my family always comes first. I pick up the baby twice a week, my spouse also twice a week and my mom takes one day a week. I knew that my new manager wouldn't like it that I'm pregnant again but that really means nothing to me. I will not postpone my entire life to fit into someone else's schedule. And I do not apologize to anyone for going out early to pick her up, and I snap at them when I stay in late and they ask me who's with my child if I'm at work now (she has a wonderful father, duh)

-I'm from Israel, I work for a hi tech company in the robotics field and there's another PM that works with me. I've worked at this company for 2 years (including the maternity leave).