Tag: botany

The reproductive cycle of the non primate females is called estrous cycle. For example, in rats, horse etc. It can be divided into four phases proestrus, estrus, metestrus and diestrus. Proestrus stage is the building up phase. The ovarian follicle becomes large and secretes estrogen which is necessary for the preparation of estrus and pregnancy. Estrus is the phase when ovulation takes place. It is also known as the period of heat and female is sexually receptive. Metestrus is the phase where corpus luteum forms under the influence of decreased estrogen and increased progesterone level. Diestrus is the phase where corpus luteum becomes functional and the progesterone level increases. So, the correct option is C.

The reproductive cycle of the non-primate females is called oestrous cycle. For example, in rats, horse etc. It can be divided into four phases proestrus, estrus, metestrus and diestrus. 

Estrous cycle is a reproductive cycle of females of non-primate vertebrates. The gap between two estrus periods is known as estrous cycle. The females are highly receptive during estrus period. It is an indication of breeding period because one or more periods of estrus may occur during the breeding season of a species. Polyoestrus are the animals which ovulates more than once in each breeding season. For example, rabbit. Cats are polyestrous but experience a seasonal anestrus in autumn and late winter. Horses are seasonal polyestrous. Humans have menstrual cycle they lack estrous cycle.

The reproductive cycle of the non primate females is called estrous cycle. For example, in rats, horse etc. It can be divided into four phases proestrus, estrus, metestrus and diestrus. Proestrus stage is the building up phase. The ovarian follicle becomes large and secretes estrogen which is necessary for the preparation of estrus and pregnancy. Swelling in vulva and vagina can be noticed which indicates the preparation of sexual receptivity. The glands of uterus show hypertrophy due to the heat. Estrus is the phase when ovulation takes place. It is also known as the period of heat and female is sexually receptive. Metestrus is the phase where corpus luteum forms under the influence of decreased estrogen and increased progesterone level. Diestrus is the phase where corpus luteum becomes functional and the progesterone level increases. So, the correct option is D.

• Hysterical pregnancy is the appearance of signs and symptoms associated with pregnancy when the person is not actually pregnant.
• It is also known as false pregnancy, phantom pregnancy, pseudopregnancy or pseudocyesis, 
• False pregnancy may sometimes be purely psychological.
• So, the correct option is 'All of the above'.

Estrous cycle comprises of the recurring physiologic changes that are induced by reproductive hormones in females of mammals. Monoestrous means having one estrous cycle per year. Diestrous means having two estrous cycles per year. Polyestrous means having many estrous cycles per year. A female dog is an example of diestrous. 

• Anestrus is a state or interval of sexual inactivity between periods of activity in periodically breeding mammals.
• The first phase (proestrus) of the estrous cycle is the building-up phase. During this phase the ovarian follicle (under the influence of FSH and LH) enlarges and begins to secrete estrogens.
• The end of sexual receptivity marks the beginning of metestrus, the post-ovulatory phase dominated by corpus luteum function. 
  
• So, the correct option is 'Anestrus'.

• The first phase (proestrus) of the estrous cycle is the building-up phase. During this phase the ovarian follicle (under the influence of FSH and LH) enlarges and begins to secrete estrogens.
  
• Estrus is the period of sexual receptivity. It is primarily initiated by the elevation in estrogens from mature follicles just prior to ovulation.
  
• The end of sexual receptivity marks the beginning of metestrus, the post-ovulatory phase dominated by corpus luteum function. 
  
• Anestrus is a state or interval of sexual inactivity between periods of activity in periodically breeding mammals.
  
• So, the correct option is 'Anestrus'.