@book{44042,
	author = {Mohammed Mohammed Sayed Ahmed and Amr Abouelela , },
	title = {Study of qualitative blood flow parameters in the spiral artery and serum Ý-subunit HCG and progesterone concentration in cases of first trimester threatened abortion / },
	publisher = {Mohammed Mohammed Sayed Ahmed , },
	year = {2013},
	address = {Cairo : },
	url = {http://172.23.153.220/th.pdf}
}