First Trimester Vaginal Bleeding and its Consequences on the Current Gestation

Journal of Research in Medical and Dental Science
eISSN No. 2347-2367 pISSN No. 2347-2545

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Research Article - (2022) Volume 10, Issue 10

First Trimester Vaginal Bleeding and its Consequences on the Current Gestation

Niranjani S, Reshmi S*, Aravinda Hariram and Minthami Sharon

*Correspondence: Dr. Reshmi S, Department of Obstetrics and Gynaecology, Sree Balaji Medical College and Hospital, Tamil Nadu, Chennai, India, Email:

Author info »


Vaginal bleeding which occurs early in pregnancy is a normal sign of implantation of the pregnancy or it could herald the initiation of an abortion. It could also be associated to pathologic condition such as ectopic pregnancy/gestational trophoblastic disease. In this study, we focused on the effects of first trimester vaginal bleeding and its outcome of the current gestation and the results concluded that those who experience vaginal bleeding during the first trimester of pregnancy face a high risk of abortion, and those who continue to carry the pregnancy are at greater risk of adverse maternal and neonatal outcomes


Abortion, Gestation, Vaginal bleeding


Vaginal bleeding in pregnancy’s a frequently occurring symptom that complicates 16-25% of pregnancies. In the past many years concerns for maternal and foetal wellbeing have made obstetricians focus more on early pregnancy. Meta-analysis indicates that vaginal bleeding increases the risk of complications during pregnancy [1]. Vaginal bleeding that occurred after confirming with UPT +ve requires a confirmatory ultrasound to identify an extra uterine early. Many times, the woman present to clinic with complaints of amenorrhea and bleeding and for these patients an ultrasound scan is done to confirm not only the viability but also its location [2].

When a pregnant woman in early weeks of gestation has bleeding, it may cause distress and anxiety for the women about the progress of pregnancy. This can be difficult time for the women because of uncertainty of the aftermath, lack of precautionary measures and emotional toil of pregnancy loss. Few studies have evaluated the outcomes rather than the viability at term. The end result of ongoing pregnancies after vaginal bleeding is of relevance to mothers and their obstetricians in planning their antenatal care [3]. This study is to identify effects of 1st trimester vaginal bleeding on maternal and perinatal outcomes.

Materials and Methods

In this study, 200 patients with first trimester were observed to evaluate the pregnancy following threatened abortion and identify the possible risk factors causing abortion.

Inclusion criteria

• Singleton pregnancy

• Intrauterine pregnancy

• Vaginal bleeding <13+6 weeks

Exclusion criteria

• Ectopic pregnancy

• Chronic hypertension

• Diabetes mellitus

• Thrombophilia

• Smoker

• Previous congenital malformations in their children

• History of trauma or surgery to cervix

• Cervical incompetence

• Congenital uterine anomalies

• Uterine fibroids or local pathologies like cervical polyp, erosion, vaginal growth

Statistical method of analysis

Statistical analysis was done using computer SPSS IBM Version 23. Using this software range, ‘t’ values and ‘p’ values were calculated. Chi-square test was applied to find the association between two categorical variables. P-Value <0.05 was considered to be significant in the study. Mann-Whitney U test was used to test the significance of association between quantitative variables.


Patients were categorized under the following headings to measure the outcomes.

Table 1 show the total number of patients who presented with first trimester vaginal bleeding in my study that is 200. Out of these 200 patients, 111 patients who presented with first trimester vaginal bleeding aborted while 89 patients continued.

OUTCOME Frequency Percent
Patients who continued 89 44.5
Patients who aborted 111 55.5
Total 200 100

Table 1: Frequency of patients who aborted and continued.

Table 2 shows the frequency of patients across different age groups who continued and aborted pregnancy after first trimester vaginal bleeding. There is a significant association between patient who aborted and patient who continued with different age groups with P-value <0.05, Chi-square value 7.464 and DF 2. Effect size for the test is given by PHI-coefficient. Abortion rates were highest in the age group 25-34 years was highest, which was 70.3%. It was noted that as the maternal age increased abortion rates were higher with first trimester vaginal bleeding.

19-24 25-34 >/=35
Patients who continued 35 48 6 89
39.30% 53.90% 6.70% 100.00%
Patients who aborted 24 78 9 111
21.60% 70.30% 8.10% 100.00%
Total 59 126 15 200
29.50% 63.00% 7.50% 100.00%

Table 2: Age distribution.

Table 3 illustrates the type of Gravida. It has been found that there is a significant difference between Parity and patients who aborted and patients who continued with a P-value 0.001, Chi-square value 35.263 and DF 1. There is a moderate relationship with PHI-coefficient 0.420. 73% patients who aborted were primiparous. Primigravids who presented with first trimester vaginal bleeding had higher chances of abortion.

Primigravida Multigravida
Patients who continued 21 68 89
23.60% 76.40% 100.00%
Patients who aborted 73 38 111
65.80% 34.20% 100.00%
Total 94 106 200
47.00% 53.00% 100.00%

Table 3: Distribution based on type of gravida.

Table 4 shows the number of patients across different gestational age. There is significant association between different groups of gestational age and abortion. Women in the gestational age group <6 weeks are at a greater risk of abortion when they present with vaginal bleeding.

<6 weeks 7-10 weeks >10 weeks
Patients who continued 4 67 18 89
4.50% 75.30% 20.20% 100.00%
Patients who aborted 64 35 12 111
57.70% 31.50% 10.80% 100.00%
Total 68 102 30 200
34.00% 51.00% 15.00% 100.00%

Table 4: Distribution based on gestational age.

The P-value is 0.001, Chi-square value is 62.57 and DF is 2. There is a strong association found with PHIcoefficient 0.559. 57.7% of patients <6 weeks aborted.

Table 5 illustrates the association between the amount of bleeding and viability. There is a significant association between the amount of bleeding and the groups. The tendency to abort was higher in women with moderate and heavy bleeding. The P-value is <0.001, Chi-square is 81.886 and DF 2. There is a strong relationship with PHIcoefficient 0.640. 31.5% of women with heavy bleeding aborted.

Mild Moderate Heavy
Patients who continued 76 13 0 89
85.40% 14.60% 0.00% 100.00%
Patients who aborted 25 51 35 111
22.50% 45.90% 31.50% 100.00%
Total 101 64 35 200
50.50% 32.00% 17.50% 100.00%

Table 5: Amount of bleeding.

Table 6 shows the relation between duration of bleeding and viability of the pregnancy. No significant association between duration of bleeding and the groups was noticed in my study. 45.9% aborted when they presented with 3-4 days of bleeding. The P-value 0.240, Chi-square 4.23 and DF 3 and PHI coefficient 0.143.

OUTCOME Duration of bleeding (days) Total
01-Feb 03-Apr 05-Jun ≥ 7
Patients who continued 24 52 10 3 89
27.00% 58.40% 11.20% 3.40% 100.00%
Patients who aborted 45 51 11 4 111
40.50% 45.90% 9.90% 3.60% 100.00%
Total 69 103 21 7 200
34.50% 51.50% 10.50% 3.50% 100.00%

Table 6: Duration of bleeding.

Table 7 illustrates the presence and absence of abdominal pain. A statistically significant difference was noted in women who presented with abdominal pain and vaginal bleeding. P-value <0.05. Women with abdominal pain and vaginal bleeding have a higher risk of abortion.

Absent Present
Patients who continued 22 67 89
24.70% 75.30% 100.00%
Patients who aborted 18 93 111
16.20% 83.80% 100.00%
Total 40 160 200
20.00% 80.00% 100.00%

Table 7: Abdominal pain.

Table 8 shows the proportion of abortion and threatened miscarriage in Ultra sonogram. No statistical difference was noted in the study group with P-value being 6.15. Out of the 111 patients who aborted 27.92% of the patients had features of missed abortion in USG. Out of the 89 patients diagnosed with threatened abortion in USG, 12.35% had sub-chorionic haemorrhage.

Blighted Ovum Complete Abortion Incomplete Abortion Missed Abortion Inevitable Abortion Threatened Abortion
Patients who continued 0 0 0 0 0 89 89
0.00% 0.00% 0.00% 0.00% 0.00% 100.00% 100.00%
Patients who aborted 19 15 25 31 21 0 111
17.11% 13.51% 22.52% 27.92% 18.91% 0.00% 100.00%
Total 19 15 25 31 21 89 200
9.50% 7.50% 12.50% 15.50% 10.50% 44.50% 100.00%

Table 8: Ultrasound.

Table 9 illustrates the management of first trimester vaginal bleeding and its complications. There is a significant association between management and complications with P-value <0.023, Chi-square 2.623 and DF 2. There is a small relationship with PHI-coefficient.

Medical management of miscarriage Surgical management of miscarriage Conservative management
No Complication 65 41 86 192
33.90% 21.40% 44.80% 100.00%
Complication 2 4 3 9
22.20% 44.40% 33.30% 100.00%
Total 67 45 89 201
33.30% 22.40% 44.30% 100.00%

Table 9: Management of first trimester vaginal bleeding.

44.4% of patients who underwent surgical management of miscarriage had the highest number of complications.

Table 10 shows the complications of first trimester miscarriage. Out of the 111 patients who had a first trimester miscarriage 63.06% had no complications, 26.12% had anaemia, which was the most common.

COMPLICATIONS Frequency Percent
No complication 70 63.06%
Anaemia 29 26.12%
Sepsis 7 6.30%
ICU admissions 3 2.70%
DIC 1 0.90%
Multiple Transfusions 1 0.90%
Total 111 100.00%

Table 10: Complications of first trimester miscarriage.

Table 11 shows the consequences of threatened abortion in the first trimester. 38.20% patients had no complications. 23.59% patients had hypertensive disorders of pregnancy which was the most common complication. Among those who had hypertensive disorders of pregnancy, 42.85% had gestational hypertension, 33.33% had Non-severe preeclampsia, 14.28% had severe pre-eclampsia, 4.76% patients had eclampsia and the remaining 4.76% patients had HELLP syndrome. The second most common complication was anaemia and it constituted 12.35% patients. 5.61% patients were reported to have ante partum haemorrhage. No patients in this study had the complication of manual removal of placenta.

OUTCOME Frequency Percent
No complication 34 38.20%
Second trimester abortions 2 2.25%
Hypertensive disorders of pregnancy 21 23.59%
APH 5 5.61%
Anaemia 11 12.35%
Preterm labour 4 4.94%
PPROM 7 7.86%
PROM 2 2.24%
Manual Removal of Placenta 0 0.00%
PPH 3 3.37%
Total 89 100.00%

Table 11: Consequences in those who continued pregnancy after first trimester vaginal bleeding (threatened abortion).

Table 12 illustrates the perinatal morbidity. 47.12% of the neonates had NICU Admission, 36.78% had LBW, 33.33% were born premature and 19.54% were growth restricted. 89.86% had an APGAR <7 at 5 minutes, 10.3% had an APGAR <7 at 5 minutes.

OUTCOME Frequency Percent
Foetal Growth Restriction 17 19.54%
LBW 32 36.78%
Prematurity 29 33.33%
NICU Admission 41 47.12%
 Respiratory distress
APGAR <7 at 5 mins 9 10.3%
APGAR >7 at 5 mins 78 89.86%

Table 12: Perinatal morbidity.


It is a well-known fact that 1st trimester bleeding affects about 25% of pregnancies and 50% of affected pregnancies has a spontaneous miscarriage. The current study shows that first trimester vaginal bleeding is not only associated with abortions but also poor pregnancy outcomes. Results from this study confirm the findings from the other authors that threatened abortion is associated with an increased risk of certain adverse complications namely hypertensive disorders of pregnancy, APH, Anaemia, Preterm Labour, PPROM, PROM, and PPH.

Also the study support the fact that first trimester vaginal bleeding indicates an placental dysfunction that manifests later in pregnancy in the form of different adverse effects related to placental pathologies like hypertensive disorders of pregnancy, abruption placenta, MROP after delivery and many more. In the current study, 65.8% patients who aborted were primigravida and 34.2% were multigravida. Most patients who aborted were primigravidas. This was similar in previous study where 56.7% patients were primigravidas and 43.3% were multigravidas [4]. Out of the 200 cases with FTVB, 52% of cases had previous H/O abortion and for 48% of the patients it was their first episode. There was no significant association between vaginal bleed and H/O abortions. The probability of resulting in an abortion increased as the amount and duration of bleeding increased especially when the bleeding was associated w/t abdominal pain [5]. Similar outcomes were not observed in the current study. Pregnant women with heavy bleeding landed with either a complete or incomplete miscarriage. And those who presented with bleeding and abdominal pain had a strong association with abortion than those did not. 83.8% of patients who presented with abdominal pain, aborted [6]. At the end of 1st trimester, 55.5% pregnancies got aborted and only 44.5% pregnancies continued. Among the 55.5% of pregnancies that aborted, 33.3% pregnancies underwent medical management and 22.4% underwent uterine curettage. Blood was transfused in 4.5% of them.

In the present study only 38.20% of pregnancies had no complications. Most common consequence encountered in the current study was the hypertensive disorders of pregnancy (23.59%). Among that group 42.85% had gestational hypertension, 33.33% had non-severe preeclampsia, 14.2% severe pre-eclampsia, 4.76% had eclampsia and the remaining 4.76% had HELLP syndrome. In previous study, FTVB was predictor of poor perinatal outcome [7]. There was a significant association between FTVB and FGR, LBW and neonatal admissions. Poor perinatal outcome due to first trimester was observed in the current study.


The results of this prospective study proved that first trimester vaginal bleeding is associated with a high risk of abortion and in those who continued the pregnancy were at a higher risk of adverse maternal and neonatal outcome. Thus, these women should be counselled and advised to attend their routine antenatal check-up regularly. Also, the clinicians should be alert and pick up early signs of these complications. Pregnant women who present with first trimester bleeding should be treated as high risk. This helps facilitate decision making regarding management, mode, place and time of delivery which will inevitably improve pregnancy outcome.


Author Info

Niranjani S, Reshmi S*, Aravinda Hariram and Minthami Sharon

Department of Obstetrics and Gynaecology, Sree Balaji Medical College and Hospital, Tamil Nadu, Chennai, India

Citation: Niranjani S, Reshmi S, Aravinda Hariram, Minthami Sharon, First Trimester Vaginal Bleeding and its Consequences on the Current Gestation, J Res Med Dent Sci, 2022, 10 (10): 001-006.

Received: 29-Jul-2022, Manuscript No. JRMDS-22-53400; , Pre QC No. JRMDS-22-53400(PQ); Editor assigned: 01-Aug-2022, Pre QC No. JRMDS-22-53400(PQ); Reviewed: 16-Aug-2022, QC No. JRMDS-22-53400; Revised: 30-Sep-2022, Manuscript No. JRMDS-22-53400(R); Published: 10-Oct-2022