You wrote:
“Preventing a birth is not abortion,”
Only abortion prevents birth. If there is already a baby on the way only abortion would prevent birth.
“it’s preventing fertilization.”
The Pill is an abortifacient. Did you fail high school biology at your government school?
“If you want to carry it further you can say that nature is aborting when a woman miscarries,”
Yes, a miscarriage is called “Spontaneous Abortion”.
“or, when she has her monthly period without the egg being fertilized.”
You apparently failed Logis as well as Biology.
You talked, mentioned condoms. I answered to condoms preventing fertilization. Are you being insipid or what?