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Ponedjeljak, 29 Ožujak 2010 09:29

boy-girlMajka priroda se pobrinula da se rađa podjednak broj dječaka i djevojčica, međutim ljudi su oduvijek nastojali utjecati na spol budućeg djeteta. Na temelju najnovijih spoznaja o spremijima znanstvenici su izdvojili nekoliko savjeta za planiranje spola koji se mogu podijeliti u nekoliko skupina: vrijeme snošaja, položaj pri snošaju i pH rodnice. 

X i Y spermiji

U muškarca se stvaraju spermiji koji imaju 22 kromosoma i jedan X (ženski) ili jedan Y (muški) spolni kromosom. Ženska jajašca također imaju 22 odgovarajuća kromosoma, ali ona stvaraju samo jedan X spolni kromosom. Ako je zigota oplođena X spermijem izrast će djevojčica, a ako je oplodi Y spermij bit će dječak.

Različitost X i Y spermija:
• X spermiji su veći i sporiji od Y spermija
• X spermiji žive dulje od Y spermija

Utjecaj vremena snošaja

• da bi povećali izglede da X spermij oplodi jajašce, i dobijete djevojčicu, odnos bi trebao dva do tri dana prethoditi ovulaciji jer će jedino ženski spermiji poživjeti toliko da se susretnu s jajašcem kad bude izbačeno;
• na sam dan ovulacije veći su izgledi da Y spermij oplodi jajašce jer će on stići brže do jajašca i beba će biti muško;
• česta ejakulacija smanjuje udio Y spermija, pa je veća vjerojatnost da se dogodi djevojčica, dok suprotno tome - rjeđi seksualni odnosi povećavaju udio Y spermija i izglede da ćete dobiti dječaka.

Utjecaj položaja pri snošaju

• "misionarski" položaj preporučuje se onima koji žele curicu jer je dubina penetracije manja, čime je i manje vjerojatno da će izbacivanje sjemena biti blizu otvora cerviksa, gdje je cervikalna sluz lužnatija i kao takva više pogoduje Y spermijima;
 poza "straga" preporučuje se za dobivanje dječaka jer je penetracija dublja, čime su povećane šanse da će izbacivanje sjemena biti u lužnatijim područjima, blizu otvora cerviksa, koje prije svega najviše pogoduje Y spermijima.

Utjecaj pH rodnice


• za dobivanje djevojčice poželjno je održati ph kiselost vaginalne flore jer niti jedan spermij ne može preživjeti u ph kisleom okruženju, iako će malo kiselo okruženje uzrokovati da jedini preživjeli spermiji budu X spermiji – budući da su puno otporniji;
• kiselost možete postići i kupkom s malo octa, te se preporuča prehrana bogata kalcijem i magnezijem, slatko i povrće;

• dječacima odgovora lužnata sredina koju možete postići kupkom sa malo sode bikarbone, te je poželjna slana hrana i meso, te poneka šalica kave.

Osim laboratorijske, ne postoji nijedna 100% sigurna metoda za određivanje spola, a svakom roditelju najvažnije je jedino dobiti zdravo dijete.

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