超声断层扫描对山羊、兔妊娠及胎儿发育的研究

Study on goat and rabbit's pregnancy and their foetus growth by using ultrasonotomography

用加拿大产 AMI- 90 0型兽用超声诊断仪 ,5MHz 线阵扫描探头 ,进行奶山羊、兔妊娠诊断及胎儿发育观察。羊 :妊娠后 2 1天探到胚囊 ,妊娠 2 3天出现胎体反射 ,妊娠 2 4天探到胎心搏动。妊娠 40天时能分清胎头和躯体 ,妊娠42天时胎儿颅骨出现反射 ,出现胎动 ,妊娠 45天时颅骨反射明显 ,妊娠 50天头部固有形态比较清晰。妊娠 53天时胎动明显 ,胎儿头颈、四肢、肋骨已有较清晰的轮廓 ,胎体长 3.6～ 3.8cm。妊娠 60天时胎儿体长 3.9～ 4.3cm,妊娠 70天胎儿体长 4.7～ 5.6cm。兔早期妊娠及胎体变化 :妊娠 8天探到了胚囊。妊娠 1 4天前胚囊增长平均每天 0 .1 cm。妊娠1 8天可见胎儿脊柱和胎心搏动 ,妊娠 2 0天胎头躯体轮廓已比较清晰 ,胎体约 0 .78cm× 0 .89cm,出现胎动 ,胎心搏动明显。妊娠 1 5～ 2 0天时胚囊平均每天增长 0 .1 5cm。

Observation was made on milk goat & rabbit's pregnancy and their foetus growth by using animal used AMI 900 supersonic diagnostic set and 5MH z linear finder made in Canada.Goat:on the 2lst day of pregnancy,embryonic vesicle is found;on the 23rd day,embryonic body reflex appears; on the 24th day,there is heart pulsation;on the 40th day,the head and body can be seen clearly;on the 42nd day,foetus skull appears reflex and the foetus has movement;on the 45th day of pregnancy,foetus skull has obvious reflex;on the 50th day,the inherent shape of the head is comparatively clear;on the 53rd day,foetus movement is obvious ,the head and neck,the four limbs and rib have clear outline ,the foetus body is 3.6～3.8cm long;on the 60th day,it's 3.9～4.3cm long,and on the 70th ady,the length of the foetus body is 4.7～5.6cm.Rabbit's early pregnancy and foetus body changing:on the 8th day of pregnancy,embryonic vesicle is found,during the first 14 days of pregnancy,embryonic vesicle grows averagely 0.1cm per day;on the 17th day of pregnancy ,foetus body appears reflex; on the 18th day ,the backbone and heartbeat can be seen;on the 20th day,the outlines of the head and body are comparatively clear,the foetus body is roughly 0.78×0.89cm 2 and has foetus movement,heart pulsates obviously, during 15～20 days of pregnancy,embryonic vesicle grows averagely 0.15cm per day.