Estradiol Cypionate use while Breastfeeding
Drugs containing Estradiol Cypionate: Estrace, Vagifem, Estradiol Patch, Estrace Vaginal Cream, Climara, Yuvafem, Vivelle-Dot, Estring, Estrogel, Minivelle, Show all 109 »CombiPatch, Divigel, Activella, Estrogen Patches, Vivelle, Angeliq, Mimvey, Evamist, Delestrogen, Depo-Estradiol, Climara Pro, Femring, Estraderm, Lopreeza, Estradot, Elestrin, Alora, Natazia, Progynova, Gynodiol, Systen, Oestrogel, Estradiol G GAM, Evorel, Prefest, Lunelle, Ena, Amabelz, Oestradiol Implants, Elleste Solo, Depogen, Medidiol 10, FemSeven, Aerodiol, Valergen, Estrasorb, Primogyn Depot, Estrofem, Climodien, Estreva, Gynogen LA 20, Menostar, Thaissept, Femtrace, Thais, Provames, Oromone, Oestrodose, Menorest, Femsept, Estrapatch, Dura-Dumone, Duo-Cyp, Delidose, Mimvey Lo, Ortho-Prefest, Depo-Testadiol, Depotestogen, Dep Androgyn, Delatestadiol, Estra-Testrin, Valertest No 1, Dermestril Septem, Menaval-20, Bedol, Estro-Span 40, Clinagen LA 40, Oesclim, Estragyn LA 5, Esclim, Fempatch, Dura-Estrin, Estro-Cyp, Estradot 37.5, Estra-V 40, Estra-C, Duragen, Dioval XX, Dioval 40, Dep Gynogen, Estro-LA, Estradot 50, Organon Oestradiol, Fematrix, Femtran, FemTab, Climaval, Nuvelle TS Phase I, Menorest Patch, FemSeven Sequi Phase I, Adgyn Estro, Estradot 75, Zumenon, Sandrena, Progynova TS, Dermestril, Oestrogel Pump-Pack, Estradot 100, Duratestrin
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.
Effects on Lactation and Breastmilk
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 to 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
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.
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