It depends on a case by case basis. Since transgender men were born with the anatomy needed for natural embryonic and fetal development, some trans men who retain functioning ovaries and a uterus can become pregnant successfully in spite of having physically transitioned to male.
How can a transgender man have a baby?
By Andrea Rodrigo (embryologist).
Last Update: 03/07/2018
Bachelor's Degree in Biotechnology from the Polytechnic University of Valencia. Master's Degree in Biotechnology of Human Assisted Reproduction from the University of Valencia along with the Valencian Infertility Institute (IVI). Postgraduate course in Medical Genetics.