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Sperm transport in the female reproductive tract

Open access
Suarez, S.S., Pacey, A. A.·2006·Human Reproduction Update

Abstract

At coitus, human sperm are deposited into the anterior vagina, where, to avoid vaginal acid and immune responses, they quickly contact cervical mucus and enter the cervix. Cervical mucus filters out sperm with poor morphology and motility and as such only a minority of ejaculated sperm actually enter the cervix. In the uterus, muscular contractions may enhance passage of sperm through the uterine cavity. A few thousand sperm swim through the uterotubal junctions to reach the Fallopian tubes (uterine tubes, oviducts) where sperm are stored in a reservoir, or at least maintained in a fertile state, by interacting with endosalpingeal (oviductal) epithelium. As the time of ovulation approaches, sperm become capacitated and hyperactivated, which enables them to proceed towards the tubal ampulla. Sperm may be guided to the oocyte by a combination of thermotaxis and chemotaxis. Motility hyperactivation assists sperm in penetrating mucus in the tubes and the cumulus oophorus and zona pellucida of the oocyte, so that they may finally fuse with the oocyte plasma membrane. Knowledge of the biology of sperm transport can inspire improvements in artificial insemination, IVF, the diagnosis of infertility and the development of contraceptives.

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Metadata

Authors
Suarez, S. S., & Pacey, A. A.
Venue
Human Reproduction Update
Published
2005-11-04
Volume
12
Issue
1
Pages
23-37
ISSN
  • 1355-4786 (ISSN-L)
  • 1460-2369
OpenAlex
W2153344238
Cited by
1,113
References
3
FWCI
20.66
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Sperm transport in the female reproductive tract. https://app.cochat.ai/papers/10.1093/humupd/dmi047
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Suarez, S. S., & Pacey, A. A. (2006). Sperm transport in the female reproductive tract. Human Reproduction Update. https://doi.org/10.1093/humupd/dmi047

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