Advances in Contraceptive Vaccine Development: A Comprehensive Review.

The issues of uncontrolled global population growth and unintended pregnancies are severe, and the existing contraceptive methods have numerous limitations, making the development of novel contraceptive technologies urgent. Contraceptive vaccines offer a promising alternative to traditional contraception methods. This article reviews the three developmental stages of contraceptive vaccines, including early exploration, technical bottlenecks, and innovative development directions in the new era. This article also summarizes the targets of immunocontraception, covering the current research status of contraceptive vaccines targeting sperm production, sperm antigens, oocyte zona pellucida, and gamete outcomes. Furthermore, this article explores the advantages of contraceptive vaccines in terms of efficiency, non-invasiveness, reversibility, and the promotion of gender equality. Challenges associated with clinical translation and real-world implementation are also critically analyzed.