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Description: This stock medical illustration features a side cut view through the uterus, chorionic villi, chorionic sac, chorionic cavity and amniotic sac containing a human embryo in the fourth week of development (first month of pregnancy). At this stage the embryo has a C-shaped curve. The caudal neuropore is closed. The upper limb buds are like flippers and the lower limb buds have begun to form. Four pairs of branchial or pharyngeal arches are visible and the lens placodes (primitive eyes) are distinct. Otic pits are also present (primitive ears). The curled tail with its somites (primitive vertebrae) is a characteristic feature of this stage. The heart prominence is also easily recognized.

Last Updated: Nov 10th, 2015


THESE STATEMENTS HAVE NOT BEEN EVALUATED BY THE FOOD AND DRUG ADMINISTRATION. THIS PRODUCT IS NOT INTENDED TO DIAGNOSE, TREAT, CURE, OR PREVENT ANY DISEASE.
WARNING: Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under 6. Keep this product out of reach of children. In case of accidental overdose, call a doctor or poison control center immediately.
WARNING: Ingestion of more than 3 grams of omega-3 fatty acids (such as DHA) per day has been shown to have potential antithrombotic effects, including an increased bleeding time and International Normalized Ratio (INR). Administration of omega-3 fatty acids should be avoided in patients taking anticoagulants and in those known to have an inherited or acquired predisposition to bleeding.
Quatrefolic® is a registered trademark of Gnosis, SpA.
Covered by one or more claims of U.S. Patent # 7,947,662 CAS# 1181972-37-1