Women can not produce sperm. Only men can.
Boys generally start producing sperm between 12 and 14 years old, although some may start earlier, or later, as each boy develops at different rates.
If you are 15 years old, and you have never ejaculated, then you have started puberty late. But try masturbating for a long period of time and if sperm still does not come out then you have not yet developed sperms, and nothing can be done about it. You will start to produce sperm in your semen as you grow older. At first when masturbating you will have dry climax's, then you will progress to have some fluid which will be semen, this is usually whitish and sticky, it may be almost clear. Later as you mature you will produce sperm in the semen. It all happens during puberty. If you are 15 now you should be well away in a years time.
Yes you can produce milk. Milk production is hormone rlated and as your body returns to its pre-pregnancy state, the hormones get to work!!
During the years 1495 and 1498
Yes you can. Once a woman has gone through puberty they can concieve. You must be able to produce sperm.
Empress Zhangsun
Unless you have access to a cryogenic facility you can't.
Menstruation takes place about once a month during a woman's reproductive years. If woman has normal menstrual cycle she can get pregnant. If woman hasn't menstruation she hasn't possibility of conceiving/bearing children.
Sperm has a half life of 3 years, so most likely somewhere around six years.
Joan of Arc
A woman is born with all the eggs she will ever have, typically around 1-2 million. By puberty, this number decreases to about 300,000-400,000. Throughout her reproductive years, only about 400-500 eggs will mature and be released during ovulation.
Cashew nut trees typically begin to produce fruit around 3 to 5 years after planting. However, they reach their full production potential after about 7 to 10 years. The trees can continue to produce for several decades, with optimal yields occurring during their peak production years.