Sure, there are many studies that have been done by medical journals.
Most recently, a report was published in Science Daily in February.
Some studies include:
The Los Angeles Study conducted by the US Department of Health, Education, and Welfare
The Doring Study
The Fairfield Study
The World Health Organization Study
should I go on?
I don’t think you realize how offensive this statement is.
It’s insulting and it’s ignorant.
First, natural family *planning *is exactly that-- it can be used to *conceive *as well as to avoid– unlike contraception which is used to mutilate the sex act and sterilize.
You can use the information of your fertility signs to find your most fertile days in order to conceive.
Second, you are implying that there is something wrong with having a dozen kids. I know several CAF posters who would take issue with you on that.
Third, you are implying that those who have many children didn’t want them, plan them, or know how to avoid having them. Talk about insulting!
Every one of my friends who has many children (many being somewhere between 4 and 7) have exactly the number of children they chose to have. And, every one of my friends who has had a reason to avoid has done so successfully, myself included.
Honestly, I understand your desire to learn about the Church’s teaching regarding contraception but please do not insult the generous people who choose to have large families. It’s very rude.