Question

how do semen get transfered into females body during intercourse

Answer 1

During insemination the male releases the seminal fluid into the vagina of female during which the uterus undergoes mild contractions which acts as a suction pump and pulls the sperms through the cervix into uterus and then to the ampulla region of fallopian tube.

Answer 2

Semen is a secretion of accessory glands along with sperms. It is transferred through the penis along with sperms to the vagina of females during sexual intercourse.
Hope it helps!
Sweet Girl