No, masturbation will not harm you. If you want to keep your hymen for marriage it's best not to insert anything in to your self. Of course some women can break their hymen from exercise or using tampons.
No, it will not hurt a baby during pregnancy.
There is nothing wrong at all with masturbation as long as it's not the only thing you do or think about.
Masturbation is not harmful at all...every one does is. some people do it 10 times a day..don't worry about that. you do you. if you are single then you please yourself and you'll be fine.
If you do masturbation in a proper manner, you can satisfy yourself in one masturbation a day. Usually 21 masturbation a month is considered normal. to get full advantage of masturbation, learn female deer exercise.Also you can learn kegel exercise. Both exercises will help you to understand your sexuality.Read it and if you like it you may practice.
Number 21 is for male. I have never found number for woman. However as a general rule do as less as possible and enjoy as much as possible with quality masturbation. Search on this aspect of activity. If you want to cam down, learn abdominal breathing. Do it every day for 10 minutes twice a day. After learning you can use it any time when you need to calm your excitement.Do not treat clitoris harshly. just circulate your fingers around it. Kegel exercise will teach you to control your vaginal muscles and will strengtgeb tiyr pelvic floor. Spell check is not done. please not your English is Okay.