Girls are born ( again born ) with etc amount of eggs. These are special cells that forms into eggs. They are not manufactured like sperm. She can release ( or via science ) these eggs from early in life ( yes girls could start having period from the beginning of their lives and not at 16 ).
Menopause is the end life of being able to produce eggs. Meaning their are literally no eggs left to release.
Women ( all women ) have the ability ( proper organ systems ) to make eggs.
When a person gets a sex change, logically they make what is a vagina, and or breast but they also could use estrogen and various chemicals to force breasts growth. However other functions like
Milk production ( Note men could lactate as well )
Can only be done via those organ systems
Talking about science, we should be able to print those organs but again these same material is also dependent in terms of DNA itself. However science is not at the level to manufacture ovaries, and scrotums that is able to product sperm and ovas ( eggs ).
As of now all of these gender-bender operations ( costing hundreds if not thousands of dollars ) can not make a person give birth, nore pass on semen at all and can not be reserved ( even if so ) is not easy. If so it is an operation simular to a test-tube baby.
Right now we have idiots getting sex changes and participating in other gender sports.
They do not have all the qualities of that sexes experiences at all. They are just another gender who have been through operations to achieve this false image.
Look at fake Bradly Manning ( Chealsea )..... That is not a sex change but an imposter. They ____ him and made up some dim story with somebody with hair that does not even match Bradly at all. If this was real then it was some kind of brainwashing.