Last update: July 16, 2017

Nomegestrol Acetate

Very Low Risk for breastfeeding

Safe. Compatible.
Minimal risk for breastfeeding and infant.

Third generation synthetic progestogen which is structurally related to progesterone.
It has been used as a part of only-one-component contraceptives which have one year lasting effect for subdermal implants. Also orally used alone or associated to estrogen (see info on Estradiol + Nomegestrol).

In a study comparing effects on breastfeeding women (120 with a Nomegestrol implant and 120 with an intrauterine device (IUD), there were no significant differences on duration of breastfeeding nor somatic follow-up criteria nor health issues in infants (Abdel -Aleem 1996).

There is controversy about whether an early implant in the first few days after delivery affects milk production. Some authors consider it safer to wait for 4 to 6 weeks (ABM 2015).

Because there is less published experience than with other drugs in the same group, alternatives known as safer and of shorter half life may be preferable.

Progestogens in general are considered the contraceptive of choice during breastfeeding since they neither affect excretion and composition of the milk nor cause side effects nor affect the growth of the infants and the duration of lactation.
Progestogen implants are considered a good choice in women who are breastfeeding (Meckstroth 2001).

During lactation, progestogen-only contraceptives are preferred over those combined with estrogen. Otherwise, those with lower doses of estrogen should be used.
Within the first 6 weeks postpartum, non-hormonal contraceptive methods should be the first option. There is a controversy on whether milk production is decreased when progestogens are used prior breastfeeding is well established.

See below the information of these related products:


Suggestions made at e-lactancia are done by APILAM´s pediatricians and pharmacists, and are based on updated scientific publications.
It is not intended to replace the relationship you have with your doctor but to compound it.

Jose Maria Paricio, Founder & President of APILAM/e-Lactancia

Your contribution is essential for this service to continue to exist. We need the generosity of people like you who believe in the benefits of breastfeeding.

Thank you for helping to protect and promote breastfeeding.

José María Paricio, founder of e-lactancia.

Other names

Nomegestrol Acetate in other languages or writings:


Nomegestrol Acetate belongs to this group or family:


Main tradenames from several countries containing Nomegestrol Acetate in its composition:


Variable Value Unit
Oral Bioavail. 63 %
Molecular weight 371 daltons
Protein Binding 97 - 98 %
VD 1,7 l/Kg
Tmax 2 hours
T1/2 46 (28 - 83) hours


  1. EMA. Estradiol + Nomegestrol acetato. Ficha técnica. 2016 Full text (in our servers)
  2. EMA. Estradiol + Nomegestrol acetate. Drug Summary. 2016 Full text (in our servers)
  3. Lopez LM, Grey TW, Stuebe AM, Chen M, Truitt ST, Gallo MF. Combined hormonal versus nonhormonal versus progestin-only contraception in lactation. Cochrane Database Syst Rev. 2015 Abstract
  4. Berens P, Labbok M; Academy of Breastfeeding Medicine. ABM Clinical Protocol #13: Contraception During Breastfeeding, Revised 2015. Breastfeed Med. 2015 Abstract Full text (link to original source) Full text (in our servers)
  5. Berens P, Labbok M; Academy of Breastfeeding Medicine. Protocolo clínico de la ABM n.º 13: Anticoncepción durante la lactancia, revisado en 2015. Breastfeed Med. 2015 Full text (link to original source) Full text (in our servers)
  6. Mwalwanda CS, Black KI. Immediate post-partum initiation of intrauterine contraception and implants: a review of the safety and guidelines for use. Aust N Z J Obstet Gynaecol. 2013 Abstract
  7. Bahamondes L, Bahamondes MV, Modesto W, Tilley IB, Magalhães A, Pinto e Silva JL, Amaral E, Mishell DR Jr. Effect of hormonal contraceptives during breastfeeding on infant's milk ingestion and growth. Fertil Steril. 2013 Abstract Full text (link to original source) Full text (in our servers)
  8. Espey E, Ogburn T, Leeman L, Singh R, Ostrom K, Schrader R. Effect of progestin compared with combined oral contraceptive pills on lactation: a randomized controlled trial. Obstet Gynecol. 2012 Abstract
  9. Meckstroth KR, Darney PD. Implant contraception. Semin Reprod Med. 2001 Abstract
  10. Croxatto HB. Progestin implants. Steroids. 2000 Abstract
  11. Abdel-Aleem H, Abol-Oyoun el-S M, Shaaban MM, el-Saeed M, Shoukry M, Makhlouf A, Salem HT. The use of nomegestrol acetate subdermal contraceptive implant, uniplant, during lactation. Contraception. 1996 Abstract

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