Examlex
The time of day most hazardous for heart attacks is _ .
Implanting
The process of surgically inserting or grafting an object or material into the body.
Zygote
The initial cell formed when a sperm cell fertilizes an egg cell, which then undergoes cell division to develop into an embryo.
Blastocyst
An early stage of embryonic development in mammals characterized by a fluid-filled cavity and distinct cell layers, preceding implantation in the uterus.
Embryo
An early stage of development in multicellular organisms following fertilization, before fetal development begins.
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