Last update: May 13, 2018

Estriol (topical use)

Low Risk for breastfeeding


Moderately safe. Probably compatible.
Mild risk possible. Follow up recommended.
Read the Comment.

This is one of the three major estrogens produced in the human body. It only occurs in significant amounts in the placenta during pregnancy.
Indicated in cases of vaginal dryness in postmenopause.
Used topically with trophic effects on vaginal mucosa.

Since the last update date we have not found published data on its excretion in breastmilk.

Estriol is absorbed vaginally. Intravaginal estriol administration increased plasma levels of estriol in women in menopause (Mattsson 1983, Punnonen 1980) and produced only minor modifications of gonadotropin and prolactin levels (Keller 1981). Absorption is minimal, however, plasma levels are very low (1 nanogram/L) and becomes insignificant after the 3rd week (AEMPS 2017). A very similar substance, estradiol, administered vaginally, was also detected in breast milk (Nilsson 1978 ).

Its high percentage of binding to plasma proteins and short life means transfer to milk in significant quantities is unlikely.

Although no problems have been observed in infants whose mothers were taking estrogens, and there is no clear evidence that milk production may decrease, especially outside the neonatal period, using non-hormonal lubricants (creams, gels or ovules) to treat possible vaginal dryness due to hypoestrogenism during breastfeeding may be preferable to topical estrogens.


See below the information of this related product:

Alternatives

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

Estriol (topical use) in other languages or writings:

Group

Estriol (topical use) belongs to this group or family:

Tradenames

Main tradenames from several countries containing Estriol (topical use) in its composition:

Pharmacokinetics

Variable Value Unit
Molecular weight 288 daltons
Protein Binding 90 %
Tmax 2 (0,5 - 4) hours
T1/2 1,65 ± 0,82 hours

References

  1. Stute P. Is vaginal hyaluronic acid as effective as vaginal estriol for vaginal dryness relief? Arch Gynecol Obstet. 2013 Abstract
  2. Mattsson LA, Cullberg G. Vaginal absorption of two estriol preparations. A comparative study in postmenopausal women. Acta Obstet Gynecol Scand. 1983 Abstract
  3. Keller PJ, Riedmann R, Fischer M, Gerber C. Oestrogens, gonadotropins and prolactin after intra-vaginal administration of oestriol in post-menopausal women. Maturitas. 1981 Abstract
  4. Punnonen R, Vilska S, Grönroos M, Rauramo L. The vaginal absorption of oestrogens in post-menopausal women. Maturitas. 1980 Abstract
  5. Nilsson S, Nygren KG, Johansson ED. Transfer of estradiol to human milk. Am J Obstet Gynecol. 1978 Abstract

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