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Doctor insights on: What Is The Evolutionary Advantage Of Preventing Self Fertilization

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How does estrogen work to prevent fertilization in contraceptive pills?

How does estrogen work to prevent fertilization in contraceptive pills?

Prevents Egg Growth: Great question. Estrogen inhibits a hormone called FSH which usually helps grow an egg. But the Progesterone part of birth control prevents ovulation and makes the inside of the uterus thinner to prevent pregnancy. ...Read more

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Sorry,a follow up question to the previous. Will the morning after pill prevent fertilization/implantation in the egg knowing that they are ovulating?

Sorry,a follow up question to the previous. Will the morning after pill prevent fertilization/implantation in the egg knowing that they are ovulating?

No: The morning-after pill works by delaying ovulation. Sperm hang around for several days but no pregnancy will occur if ovulation is delayed until the sperm are all gone. If an egg is already there, the morning after pill doesn't prevent fertilization or implantation. The good news is that the egg is viable for a short time, not days and days. Best wishes! ...Read more

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Can the lack of fertile cervical mucus prevent fertilization from occurring?

Can the lack of fertile cervical mucus prevent fertilization from occurring?

Not entirely. Ideal: ..cervical mucus is clear and elastic (stringy). This type of mucus helps sperm get through the very tiny opening of the cervix into the uterus & then on to the fallopian tube where an ovum can be fertilized. Never underestimate the determination of those little critters, however. Some can & do penetrate the cervix through mucus that's less than ideal. It only takes one! Good luck! ...Read more

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Do the birth-control pills prevent fertilization or they just prevent the fertilized egg to attach to the uterus?

Do the birth-control pills prevent fertilization or they just prevent the fertilized egg to attach to the uterus?

Multi - ways: Birth control pills work in many ways depending on the type (ie Progesterone only or combination pills). The main function is to stop ovulation from occurring. If no egg is released then there is no egg to fertilize. If this fails and an egg is made and released - the secondary defense is thinning the lining to prevent embryos from implanting. They also effect cervical mucus. ...Read more

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Can heavy workout or physical exercise prevent fertilization/implantation/pregnancy?

Can heavy workout or physical exercise prevent fertilization/implantation/pregnancy?

If U R training hard: it can effectively stop periods all 2gether usually in runners, so depending on how hard U train, it can very well change Ur hormonal levels 2 the point that implantation is effected, & still have periods, but may have decreased flow as an early sign of hormonal changes. ...Read more

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Is there a type of birth control pill that doesn't prevent implantation? (Just ovulation/fertilization?) Thanks

Is there a type of birth control pill that doesn't prevent implantation? (Just ovulation/fertilization?) Thanks

Basic Pill: The basic "pill" or OCP works by tricking your body into believing it is pregnant so no ovulation occurs. If you don't ovulate, you can't get pregnant.The implantation preventives are agents like the morning after pills and the IUD. ...Read more

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How does estrogen in contraception pills prevent fertilisation in the first place?

How does estrogen in contraception pills prevent fertilisation in the first place?

Works in pituitary: The estrogen in the pill alters the normal feedback to the pituitary gland, which in turn prevents the changes (rise) in fsh (follicle stimulating hormone) and lh (luteinizing hormone) levels which lead to ovulation, which is the release of the egg from the ovary. Since the egg doesn't leave the ovary, it is not physically accessible for the sperm to fertilize it. ...Read more

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I am smoke to much ,how can prevent my self?

I am smoke to much ,how can prevent my self?

Same way as anybody: Else. First, pick a quit date and make preparations (clean your room - including walls and fabrics) get your space smoke free (esp your car, if you drive). Call a smoking cessation program in your area (1-800-quitnow can help). For some people cold turkey works, but nicotine replacement (patches, gum etc.), certain meds (chantix, zyban) and a formal cessation program can help. Good luck with it! ...Read more

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My sister has MRSA how do I prevent my self to avoid catching it ?

My sister has MRSA how do I prevent my self  to avoid catching it ?

Hand washing: Mrsa is spread by skin contact. Good hand washing every time you are in contact is a must. Also, wipe down surfaces with a disinfectant and wash laundry with a disinfecting liquid. Pets can carry mrsa, too give them a shampoo if you can. ...Read more

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How could i prevent my self from allergy?

How could i prevent my self from allergy?

It's a challenge: While there is some evidence that allergies may be delayed or prevented through intervention in infancy, there is not much an adult can do. The risk of developing allergies is in part based on genetics--higher risk if parents are allergic and environmental exposure. One way to avoid specific allergies is to avoid those occupations that carry high risk such as crab processing, sawmill work, etc. ...Read more