The release of an egg from the ovary ready for fertilisation.

The fusion of a sperm cell and an egg cell to form a zygote, usually occurring in the fallopian tube.

The process where the blastocyst embeds itself into the lining of the uterus (endometrium).

The sex cells, sperm in males and eggs (ova) in females, that combine during fertilisation.

A series of rapid cell divisions that occur in the zygote without increasing its overall size.

A solid ball of cells formed after several cleavage divisions.

A hollow ball of cells consisting of an inner cell mass (which becomes the embryo) and an outer layer called the trophoblast.

The outer layer of the blastocyst that later forms part of the placenta and helps with implantation.

An organ that forms during pregnancy to supply the embryo with nutrients and oxygen and remove waste.

Any method used to prevent pregnancy by stopping fertilisation, preventing ovulation, or blocking implantation.

The early stage of human development from implantation until about eight weeks.

A key developmental process where the embryo reorganises into three primary germ layers: ectoderm, mesoderm, and endoderm.

A structure that appears during gastrulation and marks where cells begin migrating to form germ layers.

The process where the ectoderm forms the neural tube, which becomes the brain and spinal cord.

The three layers formed during gastrulation that give rise to all tissues and organs (ectoderm, endoderm and mesoderm)

A rod-like structure formed from mesoderm that signals the ectoderm to begin neurulation; later contributes to the spine.

A tube-like structure that develops into the central nervous system (brain and spinal cord).

The outer foetal membrane that contributes to forming the placenta

The inner foetal membrane that forms the amniotic sac and helps produce and regulate amniotic fluid.

A cord containing two arteries and one vein that connects the foetus to the placenta, transporting oxygen, nutrients, and waste.

A temporary endocrine structure in the ovary that produces progesterone early in pregnancy until the placenta takes over.

The developing human from about week 9 of pregnancy until birth, when organs grow and mature.

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Human Reproduction

Fertilisation to Birth

Question	Answer
Ovulation	The release of an egg from the ovary ready for fertilisation.
Fertilisation	The fusion of a sperm cell and an egg cell to form a zygote, usually occurring in the fallopian tube.
Implantation	The process where the blastocyst embeds itself into the lining of the uterus (endometrium).
Gametes	The sex cells, sperm in males and eggs (ova) in females, that combine during fertilisation.
Cleavage	A series of rapid cell divisions that occur in the zygote without increasing its overall size.
Morula	A solid ball of cells formed after several cleavage divisions.
Blastocyst	A hollow ball of cells consisting of an inner cell mass (which becomes the embryo) and an outer layer called the trophoblast.
Trophoblast	The outer layer of the blastocyst that later forms part of the placenta and helps with implantation.
Placenta	An organ that forms during pregnancy to supply the embryo with nutrients and oxygen and remove waste.
Contraception	Any method used to prevent pregnancy by stopping fertilisation, preventing ovulation, or blocking implantation.
Embryo	The early stage of human development from implantation until about eight weeks.
Gastrulation	A key developmental process where the embryo reorganises into three primary germ layers: ectoderm, mesoderm, and endoderm.
Primitive Streak	A structure that appears during gastrulation and marks where cells begin migrating to form germ layers.
Neurulation:	The process where the ectoderm forms the neural tube, which becomes the brain and spinal cord.
Germ Layers	The three layers formed during gastrulation that give rise to all tissues and organs (ectoderm, endoderm and mesoderm)
Notochord	A rod-like structure formed from mesoderm that signals the ectoderm to begin neurulation; later contributes to the spine.
Neural Tube	A tube-like structure that develops into the central nervous system (brain and spinal cord).
Chorion	The outer foetal membrane that contributes to forming the placenta
Amnion	The inner foetal membrane that forms the amniotic sac and helps produce and regulate amniotic fluid.
Umbilical Cord	A cord containing two arteries and one vein that connects the foetus to the placenta, transporting oxygen, nutrients, and waste.
Corpus Luteum	A temporary endocrine structure in the ovary that produces progesterone early in pregnancy until the placenta takes over.
Foetus	The developing human from about week 9 of pregnancy until birth, when organs grow and mature.

Created by: Natalie.Hastings

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