Studies with human embryos in the laboratory environment, International Association for Stem Cell Research only subject to a 14-day limit. This places a major limit on stem cell research that can be applied mainly in humans.

Scientists looking for alternative ways for embryo studies that will take longer than 14 days have recently done groundbreaking work. For the first time in history, it was made with stem cells from monkeys. Embryos were transferred to surrogate mothers.

Monkeys briefly became pregnant with stem cell-created embryos:

Chinese scientists, targeting macaques with genes closest to humans, have managed to go beyond experiments on human embryos. Scientists use stem cells blastoid (stem cell-based embryo model), and in the second stage, he transferred these embryos into the uterus of 8 surrogate monkeys.

Of course, blastoids also undergo some processes before being transferred to the mother’s uterus. Scientists, blastoids Cultivate for 7 days and thus the blastoids have inner and outer cell clusters. This structure is one of the critical features of natural embryos.

After the culture phase, 8 to 10 blastoids are transferred to each of the surrogate mothers and 20-day hormone testing begins. According to the shared results, three of these embryo-like structures were observed to form a gestational sac a week or more after the transfer.

A week later, the entire embryonic structure had disappeared. Though the studies ended here, surrogate mothers, She was officially pregnant for a short time.

The research is published in Cell Stem Cell.