Yksilöalkio

Yksilöalkio, often translated as "individual embryo" or "single embryo" in English, refers to a single embryonic cell or a very early stage of embryonic development where the cells are still undifferentiated and form a single, cohesive unit. In the context of assisted reproductive technologies like in vitro fertilization (IVF), the term "yksilöalkio" can refer to a single embryo transferred into the uterus, as opposed to multiple embryos. This practice is often implemented to reduce the risk of multiple pregnancies, which can carry increased health risks for both the mother and the babies.

The development from a single-celled zygote to a multicellular embryo involves a series of cell divisions known as cleavage. During these early stages, the embryo is still considered a "yksilöalkio" until distinct cell lineages begin to specialize. The decision to transfer a single embryo is typically based on the embryo's quality, the patient's age, and previous reproductive history. The goal is to achieve a successful pregnancy with a single fetus, thereby minimizing potential complications associated with multiple gestations. Research and clinical practice continually evolve to optimize single embryo transfer rates and success.