Fetal development
-
Upload
pmas-arid-agriculture-univsersity-rawalpindi -
Category
Education
-
view
14 -
download
0
Transcript of Fetal development
![Page 1: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/1.jpg)
![Page 2: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/2.jpg)
AGE DETERMINATION OF FETUS AND EMBRYO
14-Arid-2022 FAISAL SHAHZAD SOMROO
PRESENTED TO: .Dr. Riaz husain Pasha .Dr. Mujeeb-ur-Rehman Sohoo
PRESENTED BY:
![Page 3: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/3.jpg)
Contents Difference between fetus and embryo Stages of development Methods of age determination Different statics Fetal and gestational age
![Page 4: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/4.jpg)
Difference between fetus and embryo
The embryo is defined as the developing pregnancy from the time of fertilization until the end of the eighth week of gestation.
While the fetus a developing mammal or other viviparous vertebrate after the embryonic stage and before birth.
![Page 5: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/5.jpg)
Fetus Embryo
![Page 6: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/6.jpg)
Stages of DevelopmentWeek 1: Zygote Morula Blastocyst
![Page 7: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/7.jpg)
Cont…Week 2: Trophoblast-outer cell layer Embryoblast-inner cell mass Implantation Bilaminar embryo
![Page 8: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/8.jpg)
Cont…Week 3: Gastrulation Notochord formation Trilaminar embryo Mesoderm Somitogenesis Neurogenesis
![Page 9: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/9.jpg)
Cont…Week 4: Heart Placodes Pharygeal arches
![Page 10: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/10.jpg)
Cont… Week 5-7: Early face development WEEK 8 last week of embryonic
development
![Page 11: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/11.jpg)
![Page 12: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/12.jpg)
IMPLANTATION OF EMBRYO
![Page 13: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/13.jpg)
Stage Days
Size (mm)
1 1 0.1 - 0.15
2 2-3 0.1 - 0.2
3 4-5 0.1 - 0.2
4 5-6 0.1 - 0.2
5 7-12 0.1 - 0.2
6 13-15 0.2
7 15 - 17 0.4
![Page 14: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/14.jpg)
Stage Days Size (mm)
8 17-19 1.0 - 1.5
9 19-21 1.5 - 2.5
10 22-23 2 - 3.5
11 23-26 2.5 - 4.5
12 26-30 3 - 5
13 28-32 4 - 6
14 31-35 5 - 7
![Page 15: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/15.jpg)
Stage Days
Size (mm)
14 31 - 35 5 - 7
15 35 - 38 7 - 916 37 - 42 8 - 1117 42 – 44 11 - 1418 44 - 48 13 - 1719 48 – 51 16 - 1820 51 – 53 18 - 22
![Page 16: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/16.jpg)
WHY TO DO IT? For the comparison between normal and
abnormal structure. For diagnosing some inherited disease Cheking there functioning.
![Page 17: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/17.jpg)
EMBRYO STAGES
![Page 18: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/18.jpg)
Methods of determination of age
Ultrasound Method Rectal Examination Method
![Page 19: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/19.jpg)
Ultrasound Method It is a method used for the determination
of fetus and embryo This method is used for the diagnosis of
disease
![Page 20: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/20.jpg)
ULTRASOUND METHOD
![Page 21: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/21.jpg)
Rectal Examination Method
It is a method which is used to determine the age of embryo or fetus with the help of hand.
During rectal examination of animal we focus on the following points in order to determine the exact age of embryo or fetus
Diameter of Amniotic Vesicle Diameter of Placentomes Diameter of Horn containing the fetus Amount of Fetal Fluid Weight of Fetus Diameter of uterine Artery
![Page 22: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/22.jpg)
![Page 23: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/23.jpg)
![Page 24: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/24.jpg)
Cont… Following are the points we will prefer
more Diameter of Amniotic Vesicle Diameter of Placentomes
![Page 25: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/25.jpg)
Diameter of Amniotic Vesicle
A thin, tough, membranous sac that encloses the embryo or fetus of a mammal, bird, or reptile is called Amniotic Vesicle.
It is filled with a serous fluid in which the embryo or fetus is suspended.
In this method we determine the diameter of amniotic vesicle by using our hands.
![Page 26: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/26.jpg)
Diameter of Placentomes
The whole group of fetal and maternal tissues that are involved in placentation is called Placentomes.
In this method we determine the diameter of placentomes by using our hand.
![Page 27: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/27.jpg)
Days of Gestation Diameter of Amniotic Vesicle
30 1.0 cm (Pea Size)
40 2.5-3.0 cm (Size of Plum)
50 3.5-5.0 cm
60 6-7.5 cm
![Page 28: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/28.jpg)
Day of Gestation
Diameter of Placentomes
70 0.5-0.75 cm80 0.5-1.0 cm90 1.0-1.5 cm120 1.5-2.5 cm150 2.5-4.0 cm180 4.0-5.0 cm210 5.0-7.5 cm240 6.0-9.0 cm270 8.0-12 cm
![Page 29: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/29.jpg)
Days of Gestation Diameter of Horn Containing the fetus
30 2-4 cm40 3-6 cm50 5-7 cm60 6-9 cm70 7-10 cm80 9-12 cm90 10-13 cm120 12.5-18 cm150 18-23 cm180210240270
Diameter of Horn containing Fetus
![Page 30: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/30.jpg)
Day of Gestation Amount of Fetal Fluid30 30-60 ml40 75-100 ml50 90-200 ml60 200-450 ml70 350-650 ml80 500-800 ml90 750-1400 ml120 2000-3500 ml150 4000-5000 ml180 4000-7500 ml210 6300-10,000 ml240 8000-12000 ml270 12,000-20,000 ml
Amount of Fetal Fluid
![Page 31: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/31.jpg)
Day of Gestation Weight of Fetus30 0.3-0.5 gm40 1-1.5 gm50 3-6 gm60 8-30 gm70 25-100 gm80 120-200 gm90 200-400 gm120 1000-2000 gm150 3000-4000 gm180 5-10 kg210 8-18 kg240 15-25 kg270 20-25 kg
Weight of Fetus
![Page 32: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/32.jpg)
Days of Gestation
Diameter of Uterine Artery
30405060708090 0.3-0.5 cm120 0.5-0.8 cm150 0.6-1.0 cm180 0.9-1.25 cm210 1.25-1.5 cm240 1.25-1.7 cm270 1.5-1.9 cm
Diameter of Uterine Artery
![Page 33: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/33.jpg)
GESTATIONAL AND FETAL AGE
Gestational or menstrual age is measure of age of pregnancy where the origin is the females last estrous cycle.
Fetal age is the term that refers to the actual age of baby starting at the time of conception.
Fetal age is two weeks less than the gestational age.
![Page 34: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/34.jpg)
MATHODS FOR THE ESTEMATION Method Variability Gestational ageDays from estimated ovulation
±3 days +14days
Days from artificial insemination
±3 days +14 days
Days from known single sexual intercourse
±3 days …
First trimester physical examination
±2 weeks …
Second trimester physical examination
±4 weeks …
Third trimester physical examination
±6 weeks …
…
![Page 35: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/35.jpg)
ANY QUESTION?
![Page 36: Fetal development](https://reader035.fdocuments.net/reader035/viewer/2022062503/58d1626c1a28aba3468b5557/html5/thumbnails/36.jpg)