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Actually egg it make many sperm

In fact, the average ejaculate contains million sperm. Fertility for all genders is a combination of many factors, including age, diet, genetics, substance use, stress levels, illness, and environmental factors 1. In other words, it does in fact take two to tango. The common tale is that millions — anywhere from 20 to million , to be precise — of heroic sperm swim in competition with each other to be the lucky little swimmer that penetrates the egg. The first sperm, however, are likely not the fertilizing sperm. Following ovulation, the egg is capable of fertilization for only 12 to 24 hours. In this experiment, each trial involved mixing an ejaculate from a single male with eggs from a single female in a Petri dish.
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Conception: How It Works

Such external fertilization has been more accessible to study than the internal fertilization of mammals, which normally occurs in the female reproductive tract after mating. In fertilized mammalian eggs, the two pronuclei do not fuse directly as they do in many other species. Seminal fluid neutralizes the acidic vaginal environment to make it habitable for sperm. Older men are also more likely to pass genetic mutations onto their children, about four times faster than a woman would , according to an Icelandic study. Many sperm do not even make it into the neck of the womb cervix. The sperm swim through the cervix with the help, hopefully, of the medium of fertile cervical mucus and move into the uterus.
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Ova here, mate: do sperm 'smell' their way to the best eggs?

Garland Science ; For every ovum ovulated, about 1 billion sperm are produced 1. The egg surrounds itself with multiple barriers shown in Figure 9 , including a collection of follicular cells called the cumulus oophorus ; the glycogen-rich matrix of the egg envelope or zona pellucida in mammals ; and a plasma membrane enclosing the cytoplasm and nucleus of the egg. Illustration at top by Barbara Aulicino. Why is there so much diversity in reproductive traits and genes?
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Our closest relatives, the chimpanzees, live in social units containing several adult males that regularly engage in promiscuous mating; females in turn are mated by multiple males. ZP3 is responsible for the species-specific binding of sperm to the zona, at least in mice. Sperm cells - which are made in the testicles - need lots of high-octane fuel to whip their tails. Issues like like normal sperm motility, sperm count, sperm metabolism, and the presence of fertile-quality cervical mucus are all contributing factors in how many sperm will make it into the cervix, across the womb, and to the fallopian tube…. Explosive eversion and functional morphology of the duck penis supports sexual conflict in waterfowl genitalia.
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