    Ð°Ð½ Obstetrician is a physician who has successfully completed specialized education and training in the management of pregnancy, labor, and the puerperium (the t â¦ ime-period directly following childbirth).n Obstetrician specializes in the care and treatment of pregnant women during their pregnancy, labor, delivery and the postpartum period.
Animal skins were used as sails for the earliest boats and rafts. The Egyptians and other ancient people wove reeds together in mats to make sails, but the Egyptians were also the first to make cloth sails as early as 3300 B.C. Great sailors of the Mediterranean region like the Phoenicians sailed under cloth sails.
Hemp and flax fibre have been used for ages to produce cloth for sails. Certain classes are termed sailcloth or canvas synonymously. After the introduction of the power loom, canvas was made from flax, hemp, tow, jute, cotton, and mixtures of such fibres. Flax canvas is essentially of double warp, for it is... Read More.