Estrus or oestrus refers to the phase when the female is sexually receptive (" in heat " in American English, or " on heat " in British English). Under regulation by gonadotropic hormones, ovarian follicles mature and estrogen secretions exert their biggest influence.

4 天之前 · The estrous cycle is generally divided into the four stages of proestrus, estrus, metestrus, and diestrus. On cytological evaluation, these stages are defined by the absence, presence, or proportion of 4 basic cell types as well as by the cell density and arrangement of the cells on the slide.

The estrous cycle can be divided into four stages: proestrus, estrus, metestrus, and diestrus. During proestrus the CL regresses (progesterone declines) and a preovulatory follicle undergoes its final growth phase (estradiol increases).

Metestrus, Days 1–4 of the estrous cycle, is characterized by luteinization of theca and granulosa cells of the ovarian follicle under the influence of LH to initially form the corpus hemorrhagicum (CH) and then the CL that secretes progesterone.

Metestrus is the period of transition between ovulation and the formation of the functional corpus luteum. You might find these chapters and articles relevant to this topic. ROBERT S. YOUNGQUIST, in Current Therapy in Large Animal Theriogenology (Second Edition), 2007.

2004年9月14日 · Metestrus . Metestrus is 3-5 days long and is the time of luteal development. The corpus hemorrhagicum (CH), which is the 'bloody body' that formed from the follicle after ovulation, is developing into a corpus luteum.

* Metestrus (meht-ehs-truhs) A period following estrus that is characterized by the development of the corpus luteum and production of progesterone.

Metestrus: Ovary • Follicles: Few smaller tertiary and many scattered primary (black arrowhead) and secondary follicles (black arrow) are present • Primary follicles are the smallest of the developing follicles and are surrounded by only one layer of cuboidal cells • CL: CLs have increased in size and cells

Metestrus is the immediate time after estrus or the initial portion of the luteal phase that begins at ovulation and ends at diestrus (Fig. 1). You might find these chapters and articles relevant to this topic. Stratum mucification, stratum corneum and stratum granulosum absent. Stratum germinativum reduced to four to six layers of cells.

Metestrus I - 20 days, progesterone high, increase in estradiol; Metestrus II - 70 days, progesterone declines, estradiol declines, prolactin increases and then declines; Patterns the same in pregnant and non-pregnant bitch; Psuedo-pregnancy occurs in non-pregnant bitch because of increases in prolactin. Cat