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    sper morphology

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    Irregular Sperm concentration can result in Oligozoospermia,Azoospermia and Cryptozoospermia. Other sperm irregularities include teratozoospermia and asthenozoospermia. Spermatozoa that exhibit abnormal sperm morphology generate excessive ROS(Reactive oxygen species) which results in spermatozoa damaging their own DNA. Elevated ROS - by a disruption of the mitochondrial electron transport in spermatozoa that produce superoxide production due to the high concentration of fatty acids in morphologically

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    Oocyte Cryopreservation

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    Oocyte Cryopreservation A recent New York Times article titled "For Women Worried About Fertility, Egg Bank is a New Option" written by Sally Wadyka, focuses on the new improved technology of Oocyte cryopreservation, or the freezing of eggs. It has become a recent trend for women to wait till later in their lives to start a family. Until recently, there was no procedure available for women to store their eggs to be used at a later date. Because of this trend and the new advances in the field of

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    Infertility

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    Infertility is a significant and common problem; approximately 9% of couples throughout the world are infertile with 56% of couples needing treatment (Boivin et al, 2007). Study by Mike Hull demonstrated that sperm dysfunction is the single most common cause of male infertility (Hull, 1985). This observation has been confirmed by other studies with report that dysfunctional sperm may exist against entirely normal semen analysis and conversely normal sperm function with very poor samples (oligozoospermia)

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    By the beginning of the 18th century, the theory of preformation was widely accepted and had become the dominant model of embryonic development. The research indicated, “This time period saw the beginning of the concept of emboîtement, meaning encasement: the idea that each offspring is contained pre-formed within the gonads of its parents” (Lawrence 2013). Nicolas Malebranche contributed to this theory and the model by creating a fully reasoned explanation of it based on the Cartesian principles

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    Research Paper

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    The phone rings, but everyone pretends not to hear it because they are afraid of what they might hear. Clay’s weed trimmer is far too loud for him to hear the phone anyway, and Catherine is busy taking care of her toddler, Paul. Far away in Seattle at the University of Washington, Claire Redman, geneticist, is waiting for someone to answer the phone. She is calling to talk about a subject that is already very familiar to Catherine and Clay Johanson: cystic fibrosis. Their son, Paul, spent his second

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    Before watching “Life’s Greatest Miracle,” I knew conceiving a baby is a complex and difficult process. However, I did not realize just how complex and difficult that process actually is. Conceiving a baby takes a lot more than meets the eye: it takes DNA from both genders, the right timing and so much more. It comes as no surprise that our bodies are made to reproduce and that the urge to procreate is a fundamental part of life. Reproduction is what allows us to create generation after generation

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    The Reproductive System

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    The Reproductive System The male and female reproductive systems are different with both having specific roles. The Male Reproductive System ============================ The main structures of the male reproductive system are the testes, the penis and several glands. Male sperm carries genetic information and are produced continually from the start of puberty. The primary spermatocyte divides by meiosis make two secondary spermatocytes and then four, which have half the amount

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    Missing results graphs Why It Matters Sexual selection occurs across all species and is a key part of evolution. It allows animals to increase their fitness. Here are several interesting examples of cryptic female choice and male competition: 1) Males may perform courtship dances to show off their good genes. One species in which courtship dances can be observed are jumping spiders. Male spiders of this species wave their legs and arms to show females their abilities. Females choose a

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    Introduction A lot of attention is directed towards the female’s side of reproduction. If human couples can’t conceive children, most people think, “What is wrong with her?” Little do they know, there are a lot of potential fertility problems on the male side as well. The Centers for Disease Control and Prevention (2013) conducted a national study in 2002 with data showing that approximately 11% of 15 – 44 year old women in the U.S. have some sort of pregnancy difficulties. That same report also

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    Relationship between hyperactivation in basal level and upon addition of 4-AP to capacitation The assessment of % hyperactivation after 2h incubation in CM and NCM showed that spermatozoa were hyperactivated in initial level and after addition of 4-AP in both media, but the magnitude of the incidence was greater in samples prepared in CM than those in NCM (P<0.05 significant difference between the initial hyperactivation in two media, and very highly significant difference between response to 4-AP

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