Growing male breasts into female breasts requires a hormonal change from testosterone to estrogen and can only be achieved by receiving hormonal injections from a licensed professional. Due to the use of needles, it is important to only receive hormone injections from physicians who carefully follow safety procedures.

Visit a therapist. Before you can start taking hormones you must have permission from a therapist. The therapist will determine whether taking hormones is suitable through a number of sessions, and will give you a letter that states you are allowed to receive hormonal injections. The purpose of the sessions is to rule out the possibility of depression or other mental health problems and to confirm you are prepared for the results and changes that will occur. You can find a licensed professional at the American Medical Association's website at

Maintain injection treatments. Your doctor will usually give you Delestrogen and Depo-Estradiol injections. Monthly estrogen therapy can cost between $25 to $80, plus laboratory monitoring fees. The laboratory fees are based on where you go and how much your insurance will cover. It is important for your physician to monitor your testosterone and estrogen levels in order to ensure the injections are working properly.

Use an estrogen patch. Depending on your doctor, he or she may prescribe you an estrogen patch that distributes estrogen into your body. The patch works by remaining on your body for seven days at a time. Avoid excessive heat and moisture to ensure the patch continues to work as prescribed. It is recommended to only use one patch at a time, as there is a risk of overdosing.

Take estrogen pills. Oral estrogens are the last option as they damage the liver but absorb well. Premarin is one of the estrogen tablets prescribed to patients, although it is important to contact your doctor immediately if you start having side effects after taking Premarin. Some of the side effects include jaundice, lower leg pain, chest pain and sudden numbness. Premarin should not be taken for long periods of time as it increases your risk of stroke or blood clots.