要懷孕必須具備的條件

精子和卵子結合形成受精卵，受精卵再種植(又叫著床)到子宮內膜上生長發育，稱為受孕。受孕是一個比較複雜的過程，要完成這個過程，夫妻雙方必須具備一定的生育條件。

要懷孕必須具備的條件

這些生育條件大致可以分為以下幾個方面：

(1)男子的睾丸能產生正常的精子。

正常成年男子一次射出的精液量為2—6毫升，每毫升精液中的精子數應在6000萬以上，有活動能力的精子達60%以上，異常精子在15%—20%以下。如精子達不到上述標準，就不容易使女方受孕。

(2)女性的卵巢能排出健康成熟的卵子。

月經正常的女性，每個月經週期都有一個健康成熟的卵子排出,這樣才有機會懷孕。對於卵巢功能不全或月經不正常的女性，就不容易受孕。

(3)在女性排卵期前後要有正常的性生活，使精子和卵子有機會相遇受精。

精子在女性殖道內能生存1—3天，卵子排出後能生存1天左右，女性排卵時間在下次月經來潮前14天左右,在排卵前後幾天內性交才有受孕的可能性。在非排卵期性交是不會受孕的。

(4)生殖道必須通暢無阻。男性的輸精管道必須通暢，精子才能排出。

女性的生殖道也必須通暢,這樣性交時進入陰道內的精子可以毫無阻擋地到達輸卵管與卵子相遇受精。受精卵也可以順利地進入宮腔。

(5)子宮內環境必須適合受精卵著床和發育。

卵子受精後，一邊發育一邊向子宮方向移動，3—4天後到達子宮腔，6—8天就埋藏在營養豐富的子宮內膜裡，然後繼續發育為胎兒。受精卵發育和子宮內膜生長是同步進行的,如受精卵提前或推遲進入宮腔，這時的子宮內膜就不適合受精卵著床和繼續發育,也就不可能懷孕。上述這些受孕條件缺一不可，否則就會造成不孕。

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