Chemical Pregnancy: Causes, Symptoms, hCG, and Recovery
A chemical pregnancy is a very early pregnancy loss detected by hCG before the pregnancy can usually be seen on ultrasound.
Embryo Transfer: Procedure, Implantation, and Success
Embryo transfer places an IVF-created embryo inside the uterus, where it must implant before pregnancy can develop.
Luteal Phase: Meaning, Hormones, Length, and Fertility
The luteal phase begins after ovulation, when progesterone prepares the uterine lining for implantation, and ends when menstruation starts.
Uterine Lining: Endometrium, Menstruation, and Implantation
The uterine lining, or endometrium, is the inner tissue of the uterus that changes during the menstrual cycle and supports embryo implantation.
Conception: Meaning, Fertilization, and Pregnancy
Conception refers to the beginning of the reproductive process, commonly fertilization, although some contexts use it for implantation or the start of pregnancy.
Fertilization: Meaning, Process, Timing, and Pregnancy
Fertilization is the joining of a sperm and egg to form a zygote. It usually occurs in a fallopian tube and is followed by cell division and possible implantation.
Zygote: Meaning, Fertilization, Cell Division, and Early Development
A zygote is the single cell formed when a sperm fertilizes an egg and is the earliest stage of development before repeated cell division and implantation.
Endometrium: Meaning, Function, Menstruation, and Implantation
The endometrium is the inner lining of the uterus that changes during the menstrual cycle, supports implantation, and is partly shed during menstruation.
Embryo: Meaning, Development, Pregnancy Stages, and Usage
An embryo is a human, animal, or plant at an early developmental stage; in humans, the embryonic period lasts through eight weeks after fertilization.