    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.
The sails. 1  Sails are made by sailmakers who are highly skilled in design and material properties. 2  The sails are cut out according to the outlined dimensions drawn on them. 3  After all the pieces of each sail are sewn together, reinforcement is added to the parts of the sail that will take the most strain.