Related Experiment Video
Updated: Jul 14, 2026
08:41
Mouse Round Spermatid Injection
Published on: January 26, 2024
Gametes, consent and points of no return.
1Centre for Biomedical Ethics, Department of Primary Care, University of Birmingham, Birmingham, UK.
Human Fertility (Cambridge, England)
|June 15, 2007
Summary
Withdrawal of consent for gamete use should end at embryo creation (fertilization). This proposed change to the Human Fertilisation and Embryology Act 1990 aims to resolve disputes over stored embryos.
Area of Science:
- Reproductive Law
- Bioethics
- Embryology
Background:
- Disputes over stored embryos present significant legal and ethical challenges.
- The Human Fertilisation and Embryology Act 1990 is under review by the Department of Health.
- Current legislation does not clearly define the point at which consent for gamete use becomes irrevocable.
Purpose of the Study:
- To propose an amendment to the Human Fertilisation and Embryology Act 1990.
- To establish the creation of an embryo (fertilization) as the definitive point of no return for consent withdrawal.
- To advocate for a unified legal standing for gamete donors and providers.
Main Methods:
- Legal analysis of the Human Fertilisation and Embryology Act 1990.
- Ethical argumentation regarding consent and reproductive rights.
- Examination of case law and public consultation responses.
Main Results:
- The study argues against drawing distinctions between gamete donors and providers.
- It suggests that egg-sharers and embryo donors require specific consideration within the amended legislation.
- The proposed amendment aims to provide clarity and finality in consent for gamete usage.
Conclusions:
- Amending the Human Fertilisation and Embryology Act 1990 to set fertilization as the point of no return for consent is ethically and legally justifiable.
- This change would offer greater certainty in cases involving stored embryos.
- A consistent legal framework for all parties involved in assisted reproduction is essential.
Related Concept Videos
01:38Fertilization
During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...
01:57Meiosis II
Meiosis II is the second and final stage of meiosis. It relies on the haploid cells produced during meiosis I, each of which contain only 23 chromosomes—one from each homologous initial pair. Importantly, each chromosome in these cells is composed of two joined copies, and when these cells enter meiosis II, the goal is to separate such sister chromatids using the same microtubule-based network employed in other division processes. The result of meiosis II is two haploid cells, each containing...
02:02Meiosis II
Meiosis II entails cell division and segregation of the sister chromatids, resulting in the production of four unique haploid gametes. The steps for meiosis II are similar to mitosis, except that meiosis II occurs in haploid cells, whereas mitosis occurs in diploid cells.
The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...
The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...
02:02Meiosis II
Meiosis II entails cell division and segregation of the sister chromatids, resulting in the production of four unique haploid gametes. The steps for meiosis II are similar to mitosis, except that meiosis II occurs in haploid cells, whereas mitosis occurs in diploid cells.
The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...
The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...
01:41Spermatogenesis
Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male reproductive...
01:22Spermatogenesis
Spermatogenesis is a complex process that involves the development of sperm cells from undifferentiated stem cells in the seminiferous tubules of the testes. The process is essential for the production of mature and functional sperm cells that are capable of fertilizing an egg.
The process of spermatogenesis can be divided into mitosis, meiosis, and spermiogenesis. During mitosis, the spermatogonia or stem cells divide to produce two identical daughter cells, type A and B spermatogonia. Type-A...
The process of spermatogenesis can be divided into mitosis, meiosis, and spermiogenesis. During mitosis, the spermatogonia or stem cells divide to produce two identical daughter cells, type A and B spermatogonia. Type-A...