Polyspermic egg
Pronuclear egg cells, light micrograph
Fertilisation
In vitro fertilization of an egg
In vitro fertilization, light microscope
Developing egg
Human egg, SEM
LM of sperm on egg during fertilisation
Sperm cell fertilising an egg cell, ESEM
Sperm fertilising egg held by a skeleton
Human ovum
Ovarian follicles, light micrograph
Ovarian follicle, light micrograph
Fertilization
ICSI method of in vitro fertilization
IVF treatment
Seaweed female sex cells
Egg storage for IVF
Human egg and sperm, SEM
Eggs selected for IVF
Fertilisation, SEM
Photomicrograph of green embryo
Ovarian follicle, TEM
Ovarian follicle, SEM
Egg
Egg selection for IVF
Human sperm
Sperms swimming towards egg
Harvested human eggs
Stem cell research
Harvested eggs for IVF
Acrosome reaction, artwork
Human fertilisation, artwork
Hatching egg of the cabbage moth
Artificial insemination, artwork
Primordial egg follicle in an ovary
Primordial egg follicles in an ovary
Sperm production
In vitro fertilisation
IVF treatment, light micrograph
Meiosis, LM
Fertilisation, illustration
Human sperm and egg, artwork
Cryostorage
Ovulation and fertilisation, artwork
False-colour SEM of sperm around a human egg
LM of human embryo at four-cell stage
Graafian follicle, Light micrograph
Ovary, LM
Moth egg
Sperm cells swimming to egg in tube
Sperm
Egg of large skipper butterfly
Horse sperm
Buttercup flower, SEM
Morning glory stigma and pollen, SEM
Geranium pollen, SEM
Enkianthus flower, SEM
Scots pine pollen grains, SEM
Pollen, SEM
Common dewberry pollen, SEM
Pollen grains, light micrograph
Stiff clubmoss spores, SEM
Human sperm, SEM
Human sperm cells, SEM
Rotifer with eggs, light micrograph
Mating garden snails, Cornu aspersum
Emerging larva of Pieris brassicae
受精卵
Scutellaria seed, SEM
Chaenorhinum seed, SEM
Nemesia seed, SEM
Chaenorhinum seed.
Scutellaria seed.
Preparing sperm for IVF
Fertilisation, artwork
Sperm cell, artwork
Pollen and flower
Ovum
Zygote
Fluke egg, SEM
Microscopic image of human sperm
Human sperm cells
Bean sprouts arranged around slice of dried lotus root depicting sperm surrounding ovum
Plasmodium parasite cycle, diagram
Wild strawberry stamens, SEM
Pea flower stigma, SEM
Developing plant seeds, light micrograph
Disc floret, SEM
Pollen of an azalea, SEM
Geranium anther, SEM
Cherry blossom pollen, SEM
Lily of the valley stigma, light micrograph
Stag's-horn clubmoss spores, SEM
Gladiolus flower anther, SEM
Male chromosomes
Desmid zygote, light micrograph