Completar Frases PregnancyVersión en línea Listen to the audio and fill in the gaps por Ruben Patricio Guanuche Diaz 1 zygote embryo nutrients egg uterine male oxygen placenta fallopian female sperm uterus baby Pregnancy umbilical begins in the , where a fertilizes an . If the sperm carries an X chromosome , the will become , while a Y chromosome will result in the baby becoming . fertilized egg , or , divides repeatedly as it travels through the tube , implanting itself on the wall to form both the and a specialized organ known as the placenta . The will manage waste and provide , , and hormones via the cord .
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