Gestation period of 280 days is calculated from time of ...
Last menstruation
Fertilization
First day of last menstruation
Ovulation
Correct Answer :
C. First day of last menstruation
Related Questions
The most important region of the decidua for the nourishment of the conceptus is the deciduas
Frondosum
Capsularis
Parietalis
Basalis
Temperature in scrotum necessary for sperm formation is usually ...
2°c above body temperature
2° c below body temperature
4°c above body temperature
4° c below body temperature
The embryonic stage that resembles a mulberry fruit is
Nerula
Gastrula
Morula
Blastula
Sertoli cells are found in
Seminiferous tubules
Ovaries
Prostate gland
Semen
Mongolian idiocy due to trisomy in 21st chromosome is known as
Downs syndrome
Turners syndrome
Klinefelters syndrome
Triple x syndrome
Highly sophisticated procedure of injecting sperm directly into the ovum is
GIFT
ZIFT
ICSI
IUI
Chorionic gonadotropin is secreted by ...
Pituitary
Ovary
Placenta
Uterus
Which cells provide nutrition to the sperms?
Sertoli cells
Leydig cells
Crypt cells
Semniferous tubules
The part of the sperm containing proteolytic enzymes to digest the zona pellucida is the:
Capacitor
Head
Corona
Acrosome
Human placenta is
Endothelial
Haemochorial
Epitheliochorial
Syndesmochorial
Which one of the following is produced early in the life of a human female?
Relaxin
Oxytocin
Prolactin
Progesterone
What happens during fertilization when many sperms reach close to ovum ....
Cells of corona radiata trap all the sperm except one
Only two sperms nearest to ovum penetrate zona pellucida
Secretion of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida
All sperms except the one nearest to ovum lose their tails
Cryptorchidism is ...
Nondescent of testes in scrotum
Nondevelopment of testes
Removal of scrotum
Breaking connection of vas deferens
A child's blood group is 'o'. The parent's blood groups cannot be
A AND B
A AND A
AB AND O
B AND O
After fertilization, implantation of human embryo takes place on
10 th day
14 th day
7 th day
3 rd day
Layers of ovum from outside to inside are .
Corona radiata, zona pellucida, vitelline membrane
Zona pellucida, corona radiata, vitelline membrane
Vitelline membrane, zona pellucida, corona radiata
Zona pellucida, vitelline membrane, corona radiate
In a semen analysis, the following is not acceptable as normal�
25 % abnormal forms
60% motility after 3 hours
Mild Alkaline reaction
Sperm count of 17 million per ml.
What is the name of the inner lining of the uterus?
Myometrium
Endometrium
Epithelium
Endothelium
The number of chromosomes present in sperms
46
23
23 + X
23+ Y
Pregnancy is ascertained by
Insemination
Copulation
Implantation
Capacitation
Name the pituitary hormone that regulates sertoli cells
Prolactin
LH
FSH
Oxytocin
During ovulation, for favourable sperm travel oestrogen causes
Cervical mucus to become stretchy and clear
Less cervical mucus production
Tenderness of cervix
Slight vaginal bleeding
Cri-du-chat syndrome in humans is caused by the
Trisomy of 21st chromosome
Fertilization of an xx egg by a normal y-bearing sperm
Loss of half of the short arm of chromosome 5
Loss of half of the long arm of chromosome 5
Menstrual phase is followed by .
Luteal phase
Follicular phase
Fertilization
Implantation
Fimbriae of fallopian tube ...
Release ovum from graffian follicle
Cause endometrial changes for implantation
Help develop corpus luteum
Help collection of ovum after ovulation
Human embryo is referred to as fetus from beginning of
1st month of pregnancy
2nd month of pregnancy
3rd month of pregnancy
4th month of pregnancy
Fertilization is fusion of ..
Diploid spermatozoan with diploid ovum to form diploid zygote
Haploid spermatozoan with diploid ovum to form diploid zygote
Diploid spermatozoan with haploid ovum to form diploid zygote
Haploid spermatozoan with haploid ovum to form diploid zygote
Human eggs are
Mesolecithel
Microlecithel
Macrolecithel
Alecithel
HCG, HPL and relaxin are produced in women ...
At puberty
During pregnancy
Before puberty
At menopause
Part of sperm that passes into ovum is
Tail
Acrosome
Head
Head, neck and middle piece