{"id":10477,"date":"2015-11-05T19:45:52","date_gmt":"2015-11-06T03:45:52","guid":{"rendered":"https:\/\/www.avawomen.com\/avaworld\/conception-a-timeline\/"},"modified":"2018-02-09T03:29:28","modified_gmt":"2018-02-09T11:29:28","slug":"conception","status":"publish","type":"post","link":"http:\/\/www.avawomen.com\/avaworld\/fr\/conception\/","title":{"rendered":"La Conception"},"content":{"rendered":"

Un ovule<\/u> <\/a>ne peut \u00eatre f\u00e9cond\u00e9 que dans de bonnes conditions – avec un sperme et un ovule sains et si les rapports ont lieu au bon moment, avant l’ovulation<\/u><\/a>.<\/p>\n

Apr\u00e8s la f\u00e9condation, les chromosomes de l’ovule et du spermatozo\u00efde sont mis en contact. \u00c0 ce stade, le sexe de l\u2019ovule f\u00e9cond\u00e9 aura d\u00e9j\u00e0 \u00e9t\u00e9 d\u00e9termin\u00e9. Si c’est un gar\u00e7on, cela signifie que le sperme qui a f\u00e9cond\u00e9 l\u2019ovule a un chromosome Y; si c’est une fille, alors le spermatozo\u00efde a deux chromosomes X. En fait, le code g\u00e9n\u00e9tique entier est pr\u00e9sent dans l’organisme unicellulaire \u00e0 ce stade. Un ovule f\u00e9cond\u00e9 est appel\u00e9 un “zygote”.<\/p>\n

Afin de ne pas laisser entrer un autre spermatozo\u00efde dans l\u2019ovule (g\u00e9n\u00e9ralement, environ 250 spermatozo\u00efdes suppl\u00e9mentaires auront voyag\u00e9 \u00e0 proximit\u00e9 de l’ovule), l’ovule f\u00e9cond\u00e9 ferme imm\u00e9diatement sa membrane externe. Dans les minutes qui suivent la conception, les cellules commencent \u00e0 se diviser et \u00e0 se multiplier rapidement, puis le zygote se transforme en blastocyste. Les cellules qui sont produites aideront le d\u00e9veloppement du b\u00e9b\u00e9, tandis que d’autres sont responsables de la constitution du cordon ombilical, du sac amniotique et du placenta.<\/p>\n

La nidation a lieu lorsque le blastocyste se fixe \u00e0 l’endom\u00e8tre de l’ut\u00e9rus. Cela peut prendre trois ou quatre jours, mais peut aussi prendre jusqu’\u00e0 dix jours. Un \u00e9change d’hormones a lieu pour aider l’implant blastocyste. Une fois implant\u00e9e, l\u2019ovule f\u00e9cond\u00e9 qui continue de se d\u00e9velopper est appel\u00e9 \u00abembryon\u00bb. On parle de grossesse \u00e0 partir du premier jour de votre retard de r\u00e8gles. \u00c0 partir de ce moment, la plupart des grossesses durent environ 40 semaines.<\/p>\n

Au cours de la toute premi\u00e8re semaine de grossesse, le zygote monocellulaire se multiplie en millions de cellules. Trois groupes de cellules diff\u00e9rents commencent \u00e0 agir \u00e0 ce moment-l\u00e0. Le m\u00e9soderme forme les muscles, les reins, les organes reproducteurs, le syst\u00e8me circulatoire et le squelette; l’ectoderme forme les sens, la peau et le syst\u00e8me nerveux; et l’endoderme forme les syst\u00e8mes respiratoire et gastro-intestinal. Au cours de la deuxi\u00e8me semaine, les hormones \u00e9manent de l’embryon, ce qui provoque l’arr\u00eat du cycle menstruel de la m\u00e8re pendant la grossesse. D\u00e8s la troisi\u00e8me semaine, le rythme cardiaque commence. Au cours de la semaine quatre, le cerveau se d\u00e9veloppe, ainsi que les yeux, les oreilles et l’ouverture de la bouche. L’embryon commence \u00e0 pomper son propre sang, et les bras et les jambes commencent \u00e0 se d\u00e9velopper. C’est aussi pendant cette p\u00e9riode que le cordon ombilical est d\u00e9velopp\u00e9 et que le placenta commence \u00e0 fonctionner. Le placenta est un organe qui fournit de l’oxyg\u00e8ne et des nutriments aux b\u00e9b\u00e9s en d\u00e9veloppement, et \u00e9limine aussi les d\u00e9chets au besoin. Le d\u00e9veloppement continue \u00e0 avoir lieu, et c’est g\u00e9n\u00e9ralement \u00e0 la huiti\u00e8me semaine que la plupart des gens commencent \u00e0 se r\u00e9f\u00e9rer \u00e0 la vie en d\u00e9veloppement comme un \u00abf\u0153tus\u00bb. C’est aussi \u00e0 ce moment que les articulations se forment et le c\u0153ur bat environ 60 fois par minute.<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Un ovule ne peut \u00eatre f\u00e9cond\u00e9 que dans de bonnes conditions – avec un sperme […]<\/p>\n","protected":false},"author":9,"featured_media":10479,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[928,960],"tags":[],"yoast_head":"\nLa conception<\/title>\n<meta name=\"description\" content=\"Voici la petite histoire de la conception, de votre ovulation aux premi\u00e8res semaines de grossesse en passant par la f\u00e9condation et la nidation.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/www.avawomen.com\/avaworld\/conception\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Conception Process\" \/>\n<meta property=\"og:description\" content=\"A brief description of what is happening 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