Which method of artificial insemination involves manual guidance of the cervix through the rectum?

The method of artificial insemination that involves manual guidance of the cervix through the rectum is rectocervical insemination. This technique is particularly useful in certain species, such as cattle, where the cervix is more easily accessed through this combination of rectal and vaginal manipulation. By inserting a hand into the rectum, the practitioner can palpate and position the cervix correctly to facilitate the introduction of semen into the reproductive tract.

Rectocervical insemination is beneficial as it allows for more precise placement of semen, improving the chances of successful conception. This method is preferred in some cases because it minimizes stress for the animal compared to other techniques that may not involve rectal palpation for cervix guidance. The other choices, while related to artificial insemination, involve different methods that either do not provide the same level of direct access or utilize different approaches entirely.