oogonium cells are produced in a female once every menstrual cycle.
oogonium cells are produced in a female once every menstrual cycle.
when are oogonium cells produced in a female?
once every menstrual cycle
oogonium









































an oogonium (plural oogonia) is a small diploid cell which upon maturation forms a primordial follicle in a female fetus or the female (haploid or diploid) gametangium of certain thallophytes.









































section::::in the mammalian fetus.









































oogonia are formed in large numbers by mitosis early in fetal development from primordial germ cells. in humans they start to develop between weeks 4 and 8 and are present in the fetus between weeks 5 and 30.









































section::::in the mammalian fetus.:structure.
oogonium
the reproductive organs of the charales show a high degree of specialization. the female organ, called an oogonium is a large oval structure with an envelope of spirally arranged, bright green filaments of cells. it is termed an oogonium. the male organ or is also large, bright yellow or red in colour, spherical in shape, and is usually termed an antheridium, though some workers regard it as a multiple structure rather than a single organ. the sex organs are developed in pairs from the adaxial nodal cell at the upper nodes of the primary lateral branches, the oogonium being formed above the antheridium. they are sufficiently large to be easily seen with the naked eye, especially the bright orange or red antheridium. many species are dioecious. in others the monoecious condition is complicated by the development of the antheridium before the formation of the oogonium, thus preventing fertilization by antherozoids of the same alga. in this case the two types of sex organs usually arise from different points on the lateral branches.
charophyta