I'll echo the previous thanks. This is very reassuring. I wasn't sure how to take the 140 recommendation as I'm fairly fit and bike all the time. I am only into my 6th week and find myself strangely tired already, which is really weird because that's pretty early into my pregnancy. I was having doubts about continuing to bike but everything I read tells me it's good for me so I'll just keep at it. I have 2 questions:

Hills. The thing that worries me is that I have some short but steep hills on my way to work; no way to avoid them and for those hills only I do find myself out of breath. But we're talking about 5 minutes of a 30-minute ride. Any thoughts on the hills? My instinct tells me it's okay. And given that I'm basically a very lazy person who loves to bike, biking is really my only source of exercise so I'd like to hang on to it.

Seat height. I'm only 4-11 so every bike that I own fits relatively well but I can not touch the ground with my toes while on the seat. I did just buy one of those lightweight retro beach bikes with the wide seat and the upright handle bars and this allows me to touch the ground somewhat, although I am on my tiptoes. Does anyone have any thoughts on whether I should buy a bike that lets me fully rest my feet on the ground?

Thanks