Estradiol Cypionate use while Breastfeeding
Drugs containing Estradiol Cypionate: Estrace, Vagifem, Estrace Vaginal Cream, Vivelle-Dot, Climara, Minivelle, Vivelle, Activella, Estradiol Patch, Estring, Show all 104 »Natazia, Estrogen Patches, CombiPatch, Estrogel, Divigel, Alora, Angeliq, Estraderm, Elestrin, Mimvey, Delestrogen, Evamist, Climara Pro, Progynova, Depo-Estradiol, Femring, Estrofem, Oestrogel, Estradot, Menostar, Prefest, Duragen, Nuvelle TS Phase I, Organon Oestradiol, Dermestril, Dioval 40, Estrasorb, Femtrace, Lunelle, Depogen, Depo-Testadiol, Fematrix, Primogyn Depot, Bedol, Estreva, Zumenon, Evorel, Menaval-20, Estradot 50, Provames, Thais, Estradiol G GAM, Dermestril Septem, Delidose, Oestradiol Implants, Oromone, Estrapatch, Oestrodose, Menorest, Femsept, Systen, Climodien, Delatestadiol, Estra-Testrin, Valertest No 1, Duo-Cyp, Dep Androgyn, Depotestogen, Dura-Dumone, Ortho-Prefest, Duratestrin, Thaissept, Dura-Estrin, Medidiol 10, Estro-Span 40, Fempatch, Esclim, Oesclim, Estragyn LA 5, Estro-Cyp, Estra-V 40, Valergen, Gynodiol, Dep Gynogen, Gynogen LA 20, Estra-C, Dioval XX, Clinagen LA 40, Estro-LA, Adgyn Estro, Elleste Solo, FemSeven Sequi Phase I, Menorest Patch, FemTab, Climaval, Sandrena, Aerodiol, Estradot 75, Estradot 37.5, Estradot 100, Oestrogel Pump-Pack, Progynova TS, FemSeven, Femtran
Estradiol Cypionate Levels and Effects while Breastfeeding
Summary of Use during Lactation
Estradiol cypionate has not been studied during breastfeeding. However, the similar drug, estradiol valerate, has been used to suppress lactation, usually in combination with testosterone. Generally, estradiol cypionate should be avoided in mothers wishing to breastfeed.
Maternal Levels. Relevant published information on estradiol cypionate was not found as of the revision date. However, estradiol appears in breastmilk in small amounts after administration by other routes.
Infant Levels. Relevant published information was not found as of the revision date.
Effects in Breastfed Infants
Relevant published information was not found as of the revision date.
Possible Effects on Lactation
Another injection ester form of estradiol, estradiol valerate was previously used therapeutically to suppress lactation, usually in combination with testosterone.
A retrospective cohort study compared 371 women who received high-dose estrogen (either 3 mg of diethylstilbestrol or 150 mcg of ethinyl estradiol daily) during adolescence for adult height reduction to 409 women who did not receive estrogen. No difference in breastfeeding duration was found between the two groups, indicating that high-dose estrogen during adolescence has no effect on later breastfeeding.
Alternate Drugs to Consider
1. Nilsson S, Nygren KG, Johansson ED. Transfer of estradiol in human milk. Am J Obstet Gynecol. 1978;132:653-7 . PMID: 717472
2. Perheentupa A, Critchley HO, Illingworth PJ, McNeilley AS. Enhanced sensitivity to steroid-negative feedback during breast-feeding: low-dose estradiol (transdermal estradiol supplementation) suppresses gonadotropins and ovarian activity assessed by inhibin B. J Clin Endocrinol Metab. 2000;85:4280-6. PMID: 11095468
3. Louviere RL, Upton RT. Evaluation of Deladumone OB in the suppression of postpartum lactation. Am J Obstet Gynecol. 1975;121:641-2. PMID: 1090174
4. Morris JA, Creasy RK, Hohe PT. Inhibition of puerperal lactation. Double-blind comparison of chlorotrianesene, testosterone enanthate with estradiol valerate and placebo. Obstet Gynecol. 1970;36:107-14. PMID: 4912251
5. Iliya FA, Safon L, O'Leary JA. Testosterone enanthate (180 mg.) and estradiol valerate (8 mg.) for suppression of lactation: a double-blind evaluation. Obstet Gynecol. 1966;27:643-5. PMID: 5949195
6. Jordan HL, Bruinsma FJ, Thomson RJ et al. Adolescent exposure to high-dose estrogen and subsequent effects on lactation. Reprod Toxicol. 2007;24:397-402. PMID: 17531440
Estradiol Cypionate Identification
CAS Registry Number
LactMed Record Number
Information from the National Library of Medicine's LactMed Database.
Last Revision Date
Information presented in this database is not meant as a substitute for professional judgment. You should consult your healthcare provider for breastfeeding advice related to your particular situation. The U.S. government does not warrant or assume any liability or responsibility for the accuracy or completeness of the information on this Site.