A chemical pregnancy is not your fault!!!!!!!
Not to sound rude or anything, but I think the umbilical cord develops by the 5th week, not the 12th week. Just to make sure mothers are not encouraged to drink in the first trimester as this is when the major organs are developing (crucial period for the baby!)
It was my understanding for the first 12 weeks the embryo is nurtured by a yolk sac (unconnected to the mothers bloodflow) that develops, it then transitions to the placenta, this transition is why the twelve week stage is considered a landmark. The yolk sac is natures way of protecting the embryo from toxins etc during the early stages when a mother may be unaware of her pregnancy.
That's how my midwife explained it to me when I nervously questioned her about the TWO bottles of wine I drunk in one sitting three days before getting my BFP with my DD. She wasn't planned.
Please don't blame yourself x x x
Not to sound rude or anything, but I think the umbilical cord develops by the 5th week, not the 12th week. Just to make sure mothers are not encouraged to drink in the first trimester as this is when the major organs are developing (crucial period for the baby!)