Natural Ovulation
Natural Ovulation - Related Videos
05:41
In Vitro Ovule Cultivation for Live-cell Imaging of Zygote Polarization and Embryo Patterning in Arabidopsis thaliana
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Cited by 27 •
2017
This manuscript describes an in vitro ovule cultivation method that enables live-cell imaging of Arabidopsis zygotes and embryos. This method is utilized to visualize the intracellular dynamics during zygote polarization and the cell fate specification in developing embryos.
03:20
Microinjection of Tetrodotoxin into the Brain of an Awake Female Rat to Inhibit Ovulation
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2025
Source: Silva, C. et al. Unraveling the Role of Discrete Areas of the Rat Brain in the Regulation of Ovulation through Reversible Inactivation by Tetrodotoxin Microinjections. J. Vis. Exp. (2020)This video demonstrates the protocol for microinjection of tetrodotoxin (TTX) into the hypothalamus of a freely moving rat to transiently inhibit neuronal activity, suppress gonadotropin-releasing hormone secretion, and prevent ovulation.
01:10
Nature and Nurture
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2019
Many human characteristics, like height, are shaped by both nature—in other words, by our genes—and by nurture, or our environment. For example, chronic stress during childhood inhibits the production of growth hormones and consequently reduces bone growth and height. Scientists estimate that 70-90% of variation in height is due to genetic differences among individuals, and 10-30% of variation in height is due to differences in the environments that individuals experience, such as differences...
06:48
Natural Selection - Concepts
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2019
Fitness Widespread variation of phenotypes in natural populations provides the raw material for evolution, which is the change in the inherited traits of populations over successive generations. Natural selection is one of the main mechanisms of evolution and requires variable traits to be heritable and associated with differential survival and/or reproductive success. Phenotypes that correlate with greater success will have more offspring that survive to reproduce in the next generation, and...
08:53
Natural Selection - Student Protocol
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2019
Simulating Natural Selection ExpandTo begin, cut the white, black, and gray pipe cleaners into quarters, which should produce a total of 100 pieces that are 3 inches long. Then, cut the green pipe cleaners in the quantities and lengths specified in the video, taking care to minimize waste. This approximates a normal distribution of lengths and should result in an additional 100 pieces total. NOTE: One 12-inch pipe cleaner should yield multiple lengths, for example, a 5-inch piece and a 7-inch...
FAQs
The hypothalamic-pituitary-ovarian axis coordinates ovulation through a sequence rather than an isolated ovarian event. Follicle-stimulating hormone first supports follicular growth; as estrogen rises, it triggers the mid-cycle luteinizing hormone surge. LH then promotes follicle rupture and oocyte release, linking ovarian activity with hormonal timing across the menstrual cycle.
Follicle-stimulating hormone is important because it supports the growth of the ovarian follicle that contains the developing oocyte. This places follicular development upstream of the later estrogen rise and luteinizing hormone surge. In biological terms, FSH helps establish the follicular conditions required for the cycle to progress toward oocyte release.
Estrogen provides the signal that connects follicular growth with the mid-cycle luteinizing hormone surge. Once estrogen rises, it triggers the surge, and LH promotes rupture of the mature follicle. This hormonal transition matters because it converts preparation of the follicle into the release event that makes fertilization possible.
Following follicle rupture, the remaining follicle becomes the corpus luteum, a progesterone-producing ovarian structure. This change marks a shift from preparing the follicle to continuing hormonal activity after release. Its formation helps explain how one ovulatory event connects with reproductive timing during the remainder of the menstrual cycle.
Researchers study natural ovulation to understand how menstrual-cycle regulation coordinates reproductive timing. The hormonal sequence provides a framework for examining follicular growth, estrogen rise, the luteinizing hormone surge, follicle rupture, and corpus luteum formation. This context supports clinical assessment when ovulation is irregular or absent and relates cycle patterns to reproductive function.
Information about the cycle can inform fertility awareness by identifying biological timing associated with possible fertilization. The relevant context is not one event alone, but the relationship among follicular development, estrogen rise, the luteinizing hormone surge, and oocyte release. Studying these linked changes helps explain why reproductive timing matters in fertility-related research.
Natural ovulation provides a biological framework for investigating menstrual-cycle regulation and reproductive timing. Researchers can examine how follicular support, estrogen-associated signaling, luteinizing hormone activity, follicle rupture, and corpus luteum formation fit together. This framework is especially relevant when research addresses irregular or absent ovulation, fertility, or broader conditions affecting reproductive function.