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Minipill (progestin-only birth control pill)
This oral contraceptive, sometimes called the minipill, contains only the hormone progestin and no estrogen.
Mitral valve repair and mitral valve replacement
If you have a leaky or stiff mitral valve, you may need heart surgery. Learn about the different procedures used to repair or replace this valve.
Mohs surgery
Find out what to expect during this skin cancer surgery that involves removing thin layers of skin until only cancer-free tissue remains.
Molecular breast imaging
Learn about this breast cancer screening test that's sometimes used in addition to mammograms, especially for those with dense breast tissue.
Morning-after pill
This type of emergency birth control can help prevent a pregnancy after sex if protection wasn't used or didn't work.
Myomectomy
This surgical procedure to treat uterine fibroids tries to preserve fertility using a variety of approaches.
Nephrectomy (kidney removal)
Learn about surgery to remove all or part of a kidney.
Nondirected living-donor transplant
Nondirected living donor — Find out what becoming a good Samaritan (nondirected) living organ donor means to transplantation.
Nonstress test
Understand how this prenatal test uses fetal heart rate monitoring to evaluate your baby's health.
Oophorectomy (ovary removal surgery)
Learn about the risks, recovery and what to expect during surgery to remove the ovaries.
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