Moms, masih ingat perbedaan antara embrio dan janin (fetus)? Embrio adalah hasil pembuahan yang berhasil dan tumbuh di dalam rahim sejak minggu ke tiga hingga minggu ke enam sesudah pembuahan.
Setelah melewati minggu ke enam, hasil konsepsi masih dinamakan embrio, tapi sudah sangat mendekati tahapan fetus.
Apa saja sih yang berkembang pada embrio tahap akhir?
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Menurut clevelandclinic.org, di minggu ke enam trimester pertama, detak jantung embrio sudah bisa terdeteksi, walau sistem kardiovaskularnya belum tumbuh sempurna.
Selain itu, pertumbuhan tangan dan kaki pada embrio juga semakin sempurna.
Jika di minggu-mingu sebelumnya kaki, dan tangan masih tampak seperti tonjolan kecil, di minggu ke-enam tonjolan tersebut tampak lebih sempurna serta lebih menyerupai organ kaki dan tangan.
Pembentukan kontur wajah juga terjadi di minggu ke-enam. Hal itu ditandai dengan mulai terlihatnya fitur-fitur yang ada di wajah, seperti mata, lubang hidung, dan telinga.
Jadi, minggu ke enam adalah saat di mana embrio menuju tahap perkembangan selanjutnya, yaitu menjadi janin.
Oleh: Sahirul Taufiqurahman
(vem/rsk)

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