Isabella asked the doctor how matteo had managed to survive so far if blood was not properly circulating to his lungs. what structure was allowing some oxygenated blood access to the systemic circuit, thus keeping matteo alive immediately after birth?

Isabella asked the doctor how matteo had managed to survive so far if blood was not properly circulating to his lungs. what structure was allowing some oxygenated blood access to the systemic circuit, thus keeping matteo alive immediately after birth?

pulmonary veins carries oxygenated blood and it is the structure that allows access to systemic circuit

Explanation:

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.