Can two sperm penetrate one egg?
398600
Yes, Two sperms can fertilize a egg, but it would lead to a gestational trophoblastic neoplasia \n\nGestational trophoblastic neoplasia (GTN) can be benign or malignant. Histologically, it is classified into a hydatidiform mole, an invasive mole (chorioadenoma destruens), choriocarcinoma, and a placental site trophoblastic tumor (PSTT). Hydatidiform mole is the most common form of GTN\n\n    * A hydatidiform mole occurs when a haploid sperm fertilizes an egg that has no maternal chromosomes and then duplicates its chromosomal complement.\n\n          o Most complete hydatidiform moles are 46,XX, and all the chromosomes come from the male.\n\n          o Of hydatidiform moles, 10-15% are 46,XY. This occurs when 2 sperm, 1 carrying an X and the other carrying a Y, fertilize an “empty” egg.\n\n    * Partial moles are 69,XXY, and 2 sets of chromosomes are of paternal origin.\n-----------------------------------------------------------\nFACTOR PREVENTING ENTRY OF SPERM(s) AFTER FERTILIZATION:\n\nThe Zona Reaction\n\nThe zona reaction refers to an alteration in the structure of the zona pellucida catalyzed by proteases from cortical granules. The critical importance of the zona reaction is that it represents the major block to polyspermy in most mammals. This effect is the result of two measurable changes induced in the zona pellucida:\n\n   1. The zona pellucida hardens. Crudely put, this is analogous to the setting of concrete. Runner-up sperm that have not finished traversing the zona pellucida by the time the hardening occurs are stopped in their tracks.\n\n   2. Sperm receptors in the zona pellucida are destroyed. Therefore, any sperm that have not yet bound to the zona pellucida will no longer be able to bind, let alone fertilize the egg.
315114
Probably. The testicles are just another example of redundant anatomy in the human body, like the kidneys. A spare is always a good thing to have. As long as that one testicle is functioning properly, it can still produce and still transfer sperm to the seminal vesicles.
79897
its suppose to be two teaspoons (give or take the amount of times you...).  but the number of "sperm" can be higher or lower depending on your health and lifestyle.
101119
According to Wikipedia - yes they can. A mutation in the father's sperm can cause it - even if the father does not have it.
1149682
Yes, it only takes one sperm to get in there. Wash your hands before you touch her after cumming.
726740
150 sperm cells....\nbecause each secondary spermatocyte shall become a spermatid each...and each spermatid produces a sperm cell.... therefore, a sec. spermatocyte only produces a single sperm cell...
828620
Male sperm and Female ovum in suitable conditions!!!
360810
Yes. If you had unprotected sex.\n\nMost women have approximately a 26-28 day cycle and ovulate around day 12-14 of that cycle. Sperm can live for up to 5 days inside the vagina so there is a high chance of pregnancy.\n\nBest speak to a health professional - and use birth control (unless you are wanting to start a family).
150424
Hello,pregnancy can happen even with low motility of sperms,IT though depends on the rate of normally motile sperms and their forward direction.\nYou can imagine this by knowing that only 200 sperms reach the tubes and cause fertilization,however,there are new studies that refer to the effect of foods rich in potasium on the mot. of sperms,its well believed that is acourse of these foods{as banana,cereals,milk,potato etc}of about 2 weeks is effective,do not forget the effect of sport in this field,medically,chorionic gonadotrphins or mesterolone can be used for this purpose,good luck.
520000
only if you cover it with sperm first
769783
I'm afraid it's impossible to say unless you try it 1000 times,  ejaculate into a container from which you can have the number of sperm measured.  You can then calculate the average number of sperm produced each ejacultaion.  Take the global population figure and divide it by the average number of sperm produced each ejaculation and you'll have as close to your answer as you're going to get it.
430195
Fertility treatments that promote ovulation may lead to multiple births.
77015
This is done all the time with sperm. For example, a man might get a vasectomy but will make a deposit in a sperm bank to be used in the event that another child is desired. Also male cancer patients often do this so that they can father a child even if cancer therapy makes them sterile.\n\nSo, if it's OK to freeze sperm, why not eggs?
890847
Fertilization, because one allele from each mate is coming together.
1182923
Just one. \n\nVery few animals produce more than one offspring per egg.
702400
Multiple births come from two sources.  First, sometimes more than one egg is released in a single cycle.  If multiple eggs are fertilized, fraternal twins (or triplets or whatever) result.  That's why you get so many multiple births with fertility drugs--they often force many eggs to be released at once to improve the odds, or implant multiple fertilized eggs in the hope that at least one will live.\n\nIdentical twins and triplets are grown from a single egg and a very energetic sperm, which strikes the egg so hard that it tears apart into two or three fragments, each of which becomes a baby.  These babies all came from the same egg/sperm combo so they have the same genetic information.  That's also why you don't see identical siblings more than triplets.  There's only so many pieces you can tear an egg into with one impact.\n\nIncidentally, conjoined twins also come from a sperm tearing the egg apart.  If it doesn't quite separate, the pieces of the egg will form into two babies who are attached where the egg didn't tear.
288833
if there is mosture the sperm and egg can combie but if it can't float is water in produees asexualy