A newly developing human is typically referred to as an embryo until the ninth week after conception, when it is then referred to as a fetus. In other multicellular organisms, the word …

Dec 28, 2025 · An embryo is the early developmental stage of an animal while it is in the egg or within the uterus of the mother. In humans the term is applied to the unborn child until the end …

Between the eighth week of development and birth a human embryo is called a foetus. 从发育第8周到出生这段时间，人类的胚胎被称作胎儿。

Oct 14, 2025 · An embryo is the early stage of development and lasts from week five to week 10 of pregnancy. A fetus is the later stage of development and lasts from the end of week 10 until …

Rob Stein, NPR, 23 Dec. 2025 For the very first time, researchers captured incredible real-time, three-dimensional images and videos of a human embryo implanting into artificial uterine tissue.

embryo 是什么意思？ 查看详细定义、音标、实际例句、同义词、反义词及 embryo 的用法

In humans, the embryo is defined as the organism from the time of implantation in the uterus until about the eighth week, while the fetus is the stage from this time until birth.

Jan 5, 2026 · The geometry of the zebrafish egg is shown to generate a gradient in cell size upon successive cell divisions. This gradient specifies stereotyped patterns of cell-cycle …

胚胎 （英語： embryo）是专对 有性生殖 而言，指精子和卵子合成为合子之后，经过多次细胞分裂和 细胞分化 后形成的有发育成生物成体的能力的雏体。

embryo An organism in its earliest stages of development, especially before it has reached a stage at which it can be distinguished from other species. The human embryo is so called up …