28661

Studies of Reproductive Changes during Pregnancy in the Bitch

Article

Last updated: 03 Jan 2025

Subjects

-

Tags

Clinical Science, Surgery and Veterinary Diseases (Pathology, Clinical…ltry Diseases, Fish Diseases and Management, Surgery, Theriogenology)

Abstract

In the present study, seven mongrel bitches were used, their age ranged from 15 months to 3 years. Vaginal cytology was carried out during pregnancy period of these bitches by taking vaginal smears weekly to investigate vaginal cytological changes. Serial ultrasonography was performed daily on these bitches from the 15th day after the last breeding until birth day to determine the time of appearance of different gestational structures. The first observation of the extra-fetal and fetal structures was as follows: The yolk sac membrane was first detected as an echogenic U-shaped fetal membrane in a range of 24-25 days. A third echogenic fetal membrane, allantoic membrane, was first detected on Day 27. On Day 23, in the uterine wall surrounding the gestational sac, an apparently hyperechoic inner layer was differentiated to the zonary placenta which appeared as two thick bands one on either side of the fetus on Day 29. The embryo appearance was on Day 20.5. The early time of the position of the embryo either opposed to the uterine wall or dependent on chorionic cavity was nearly on Day 22 and on Day 24, respectively. The heartbeat, which is one of fetal vital signs, was detected as a bright echogenic flickering motion on Day 21. On Day 26 in mongrel bitches, the features of the embryo changed from an oblong to bipolar shape and form two loops of number 8, size and density the same. An anechoic area in the head of the embryo was detected on Day 29. The limb buds were firstly detected on Day 29. Fetal movement was firstly detected on Day 33. Meanwhile, the skeleton of the fetus was first detected as hyperechoic structure on Day 33.

DOI

10.21608/zvjz.2019.28661

Keywords

Reproduction, Pregnancy, Bitch, Ultrasonography

Authors

First Name

Faten M.

Last Name

Labib

MiddleName

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Affiliation

Theriogenology Department, Faculty of Veterinary Medicine, Zagaig University, 44511, Egypt

Email

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City

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Orcid

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First Name

El Azab A.

Last Name

El Azab

MiddleName

-

Affiliation

Theriogenology Department, Faculty of Veterinary Medicine, Zagaig University, 44511, Egypt

Email

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City

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Orcid

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First Name

Hassan H.

Last Name

Mansour

MiddleName

-

Affiliation

Theriogenology Department, Faculty of Veterinary Medicine, Zagaig University, 44511, Egypt

Email

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City

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Orcid

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First Name

Atef B.

Last Name

Mahdy

MiddleName

-

Affiliation

Theriogenology Department, Faculty of Veterinary Medicine, Zagaig University, 44511, Egypt

Email

-

City

-

Orcid

-

First Name

Asmaa A.

Last Name

Abdallah

MiddleName

-

Affiliation

Theriogenology Department, Faculty of Veterinary Medicine, Zagaig University, 44511, Egypt

Email

-

City

-

Orcid

-

Volume

45

Article Issue

Supplementary 1

Related Issue

5095

Issue Date

2017-10-01

Receive Date

2019-03-13

Publish Date

2017-10-01

Page Start

165

Page End

171

Print ISSN

1110-1458

Online ISSN

2357-075X

Link

https://zvjz.journals.ekb.eg/article_28661.html

Detail API

https://zvjz.journals.ekb.eg/service?article_code=28661

Order

17

Type

Original Article

Type Code

601

Publication Type

Journal

Publication Title

Zagazig Veterinary Journal

Publication Link

https://zvjz.journals.ekb.eg/

MainTitle

Studies of Reproductive Changes during Pregnancy in the Bitch

Details

Type

Article

Created At

22 Jan 2023