गर्भाधान से लेकर विकास के आठवें सप्ताह (दो महीने) के अंत तक विकसित हो रहे मानव जीव के लिए किस शब्द का प्रयोग किया जाता है?

The embryo begins to differentiate itself into three distinct layers known as:

The protective fluid that surrounds and cushions the developing embryo inside the gestational sac is called:

A nurse educating postgraduate nursing students explains early embryonic development. Which finding best confirms that an embryo has progressed beyond the morula stage but has not yet implanted?