Biology – Conservation | e-Consult

In Vitro Fertilisation (IVF) involves fertilising an egg with sperm outside the body, in a laboratory environment. This is particularly useful when natural mating is difficult or impossible due to low population numbers, geographical isolation, or reproductive issues. The retrieved eggs are combined with sperm, and if fertilisation occurs, the resulting embryo(s) are cultured for a few days. The most viable embryo(s) are then transferred back into the uterus of a surrogate mother.

Embryo Transfer is a key step in IVF, but can also be used independently. Embryos are created through artificial insemination or other methods, and then surgically implanted into the uterus of a surrogate mother. This is often employed when the female is infertile or has a history of reproductive problems.

Advantages of IVF and Embryo Transfer in Conservation:

• Overcoming Low Fertility: IVF bypasses natural reproductive limitations, allowing for fertilisation even with small numbers of potential mates.
• Preserving Genetic Diversity: Embryos can be frozen (cryopreserved) and stored for future use, maintaining genetic diversity within the population. This is crucial for long-term survival.
• Addressing Geographical Barriers: Species in geographically isolated populations can be brought together for artificial fertilisation.
• Managing Reproductive Issues: IVF can overcome issues such as sperm motility problems or uterine abnormalities.

Disadvantages of IVF and Embryo Transfer in Conservation:

• High Cost: IVF is a complex and expensive procedure, limiting its application to well-funded conservation programs.
• Technical Challenges: Successful IVF can be technically challenging, and success rates can vary depending on the species.
• Surrogate Mother Issues: Finding suitable surrogate mothers can be difficult, and there are ethical considerations surrounding the use of other species as surrogates.
• Genetic Bottleneck Risk: If only a small number of individuals contribute to the IVF process, it can exacerbate existing genetic bottlenecks.