This is pretty ambiguous.
If you're five months pregnant, it's almost certainly not a great idea for you to be lifting 175 pounds, whether in the form of a woman or anything else.
It's also not a great idea to be lifting someone who is pregnant if there is any possibility that you might drop her, no matter what she weighs.
Finally, if you can't lift 175 pounds, then you shouldn't lift 175 pounds.
All in all, no matter what you actually meant to ask, the answer is probably "Yes, that's dangerous."
While you are pregnant you do not have periods at all.
No you don't ovulate while pregnant so there's no egg to fertilize.
Yes, appetite increase while you are pregnant
Yes but not for a long period of time
The chemicals caused by combustion are dangerous.
See your doctor ASAP! If you have a bladder infection it can be very dangerous as pregnant.
every month
Yes it's possible to be depressed while being pregnant. Talk to a doctor about it. It can be dangerous to let it go on without doing anything about it.
Sometimes, you CAN bleed while you are pregnant, but of course, it is not considered a period. I bled for first three months while I was pregnant, it is not dangerous or anything but what IS dangerous, is NOT knowing that you are pregnant because you are not eating like you should and you may be drinking and/or smoking. Go take a pregnancy test just in case :]
You don't need a contaeception method while you are pregnant because you will not be able to get pregnant
Yes, bleeding while pregnant is possible, though unlikely. You may want to speak with your doctor.
No, that's why it's called CONTRACEPTION.