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Reproductive Cloning

Reproductive Cloning

Reproductive cloning is the process of producing a genetically identical copy—a clone—of an entire organism. While clones can be produced by splitting an early embryo—similar to what happens naturally with identical twins—cloning of adult animals is usually done by a process called somatic cell nuclear transfer (SCNT).
Somatic Cell Nuclear Transfer
In SCNT, an egg cell is taken from an animal and its nucleus is removed, creating an enucleated egg. Then a somatic cell—any cell that is not a sex...

Reproductive Cloning

Reproductive Cloning

Reproductive cloning is the process of producing a genetically identical copy—a clone—of an entire organism. While clones can be produced by splitting an early embryo—similar to what happens naturally with identical twins—cloning of adult animals is usually done by a process called somatic cell nuclear transfer (SCNT).
Somatic Cell Nuclear Transfer
In SCNT, an egg cell is taken from an animal and its nucleus is removed, creating an enucleated egg. Then a somatic cell—any cell that is not a sex...

In Vitro Fertilization

In Vitro Fertilization

In vitro fertilization (IVF) is a form of assisted reproductive technology where an egg is fertilized with sperm in a controlled laboratory environment before transferring the resulting embryo into the uterus. This process is designed to help individuals and couples experiencing difficulties conceiving.
The IVF process begins with ovarian stimulation, during which reproductive endocrinologists prescribe hormonal medications to stimulate the ovaries to produce multiple eggs instead of the single...

Fertilization

Fertilization

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...

Gene Conversion

Gene Conversion

Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...

Mate Choice

Mate Choice

Mate choice—the decision about whom to mate with—is a type of natural selection, since animals must reproduce to pass down their genes. Mate choice is also called intersexual selection because the behavior occurs between the sexes.

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Related Experiment Video

Updated: May 30, 2026

Inducing Pseudopregnancy in Female Mice Without the Need for Vasectomized Males Prior to Non-Surgical Embryo Transfer or Artificial Insemination

Inducing Pseudopregnancy in Female Mice Without the Need for Vasectomized Males Prior to Non-Surgical Embryo Transfer or Artificial Insemination

Published on: July 7, 2023

Mating by proxy: a novel perspective to donor conception.

Iolanda S Rodino¹, Peter J Burton, Katherine A Sanders

¹School of Anatomy & Human Biology, The University of Western Australia, Crawley, Western Australia, Australia. iolanda@perthivf.com

Fertility and Sterility

|August 9, 2011

Summary

This summary is machine-generated.

Single women seeking donor insemination prioritize donor resources and character more than partnered lesbian or heterosexual women. This aligns with parental investment theory, highlighting differing needs in single versus partnered conception journeys.

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Last Updated: May 30, 2026

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Area of Science:

Reproductive Science
Psychology
Sociology

Background:

Donor insemination is a key reproductive technology for various women.
Understanding donor selection criteria is crucial for reproductive decision-making.
Trivers's parental investment theory offers a framework for analyzing mating and parental behaviors.

Purpose of the Study:

To investigate how single, partnered lesbian, and partnered heterosexual women value donor characteristics.
To examine these preferences within the theoretical framework of parental investment theory.

Main Methods:

Study involved women undergoing donor insemination.
Participants rated the importance of various donor characteristics.
Analysis compared ratings across single, partnered lesbian, and partnered heterosexual women.

Main Results:

Single women placed significantly higher importance on donor biographical traits related to resources (e.g., occupation, hobbies, age).
Single women also valued donor character more highly than partnered women.
Partnered lesbian and heterosexual women showed similar, lower valuations of these specific donor traits compared to single women.

Conclusions:

Findings support Trivers's parental investment theory, suggesting single women seek greater indirect genetic or resource contributions from donors.
Divergent priorities in donor selection reflect different reproductive strategies and social contexts among women.
This research informs counseling and support for diverse individuals and couples utilizing donor insemination.